LLVM Clang Optimization Levels On Intel Rocket Lake
Clang 12 on Intel Core i9 11900K optimization levels. Benchmarks by Michael Larabel for a future article.


-O0: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-Og: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O1: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O2: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O2 -flto: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O2 -march=native: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O3: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O3 -flto: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O3 -march=native: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-O3 -march=native -flto: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-Ofast: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-Ofast -march=native: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160

-Ofast -march=native -flto: 

	Processor: Intel Core i9-11900K @ 5.10GHz (8 Cores / 16 Threads), Motherboard: ASUS ROG MAXIMUS XIII HERO (0707 BIOS), Chipset: Intel Tiger Lake-H, Memory: 32GB, Disk: 2000GB Corsair Force MP600 + 257GB Flash Drive, Graphics: AMD Radeon VII 16GB (1801/1000MHz), Audio: Intel Tiger Lake-H HD Audio, Monitor: ASUS MG28U, Network: 2 x Intel I225-V + Intel Wi-Fi 6 AX210/AX211/AX411

	OS: Fedora 34, Kernel: 5.12.9-300.fc34.x86_64 (x86_64), Desktop: GNOME Shell 40.1, Display Server: X Server + Wayland, OpenGL: 4.6 Mesa 21.1.1 (LLVM 12.0.0), Compiler: Clang 12.0.0, File-System: btrfs, Screen Resolution: 3840x2160


Crypto++ 8.2
Test: All Algorithms
MiB/second > Higher Is Better
-O0 ........................ 501.99  |=========
-Og ........................ 1159.09 |=====================
-O1 ........................ 1155.71 |=====================
-O2 ........................ 2131.43 |=======================================
-O2 -flto .................. 2157.79 |=======================================
-O2 -march=native .......... 2241.56 |=========================================
-O3 ........................ 2137.06 |=======================================
-O3 -flto .................. 2157.91 |=======================================
-O3 -march=native .......... 2239.22 |=========================================
-O3 -march=native -flto .... 2253.38 |=========================================
-Ofast ..................... 2136.47 |=======================================
-Ofast -march=native ....... 2235.96 |=========================================
-Ofast -march=native -flto . 2250.69 |=========================================


Crypto++ 8.2
Test: Keyed Algorithms
MiB/second > Higher Is Better
-O0 ........................ 125.36 |=====
-Og ........................ 316.86 |==============
-O1 ........................ 316.85 |==============
-O2 ........................ 884.90 |======================================
-O2 -flto .................. 895.88 |======================================
-O2 -march=native .......... 965.80 |=========================================
-O3 ........................ 886.09 |======================================
-O3 -flto .................. 894.84 |======================================
-O3 -march=native .......... 966.63 |=========================================
-O3 -march=native -flto .... 979.14 |==========================================
-Ofast ..................... 886.12 |======================================
-Ofast -march=native ....... 967.70 |==========================================
-Ofast -march=native -flto . 978.69 |==========================================


Crypto++ 8.2
Test: Unkeyed Algorithms
MiB/second > Higher Is Better
-O0 ........................ 141.03 |===========
-Og ........................ 279.07 |======================
-O1 ........................ 279.12 |======================
-O2 ........................ 497.11 |========================================
-O2 -flto .................. 499.91 |========================================
-O2 -march=native .......... 526.82 |==========================================
-O3 ........................ 498.07 |========================================
-O3 -flto .................. 500.81 |========================================
-O3 -march=native .......... 525.47 |==========================================
-O3 -march=native -flto .... 528.13 |==========================================
-Ofast ..................... 498.64 |========================================
-Ofast -march=native ....... 526.22 |==========================================
-Ofast -march=native -flto . 527.47 |==========================================


Crypto++ 8.2
Test: Integer + Elliptic Curve Public Key Algorithms
MiB/second > Higher Is Better
-O0 ........................ 1987.69 |=============
-Og ........................ 4455.00 |=============================
-O1 ........................ 4455.20 |=============================
-O2 ........................ 6106.88 |========================================
-O2 -flto .................. 6167.64 |=========================================
-O2 -march=native .......... 6206.23 |=========================================
-O3 ........................ 6129.55 |========================================
-O3 -flto .................. 6182.76 |=========================================
-O3 -march=native .......... 6222.49 |=========================================
-O3 -march=native -flto .... 6210.39 |=========================================
-Ofast ..................... 6117.28 |========================================
-Ofast -march=native ....... 6183.45 |=========================================
-Ofast -march=native -flto . 6201.96 |=========================================


Botan 2.17.3
Test: KASUMI
MiB/s > Higher Is Better
-O0 .................. 34.44  |==============
-Og .................. 83.11  |=================================
-O1 .................. 83.09  |=================================
-O2 .................. 117.57 |==============================================
-O2 -march=native .... 121.59 |================================================
-O3 .................. 117.61 |==============================================
-O3 -march=native .... 121.80 |================================================
-Ofast ............... 117.62 |==============================================
-Ofast -march=native . 121.72 |================================================


Botan 2.17.3
Test: KASUMI - Decrypt
MiB/s > Higher Is Better
-O0 .................. 32.57  |=============
-Og .................. 79.72  |================================
-O1 .................. 80.73  |================================
-O2 .................. 101.07 |========================================
-O2 -march=native .... 120.34 |================================================
-O3 .................. 101.46 |========================================
-O3 -march=native .... 120.78 |================================================
-Ofast ............... 101.18 |========================================
-Ofast -march=native . 120.76 |================================================


Botan 2.17.3
Test: Twofish
MiB/s > Higher Is Better
-O0 .................. 43.43  |=====
-Og .................. 54.30  |======
-O1 .................. 54.21  |======
-O2 .................. 422.76 |=============================================
-O2 -march=native .... 453.84 |================================================
-O3 .................. 423.43 |=============================================
-O3 -march=native .... 454.18 |================================================
-Ofast ............... 423.21 |=============================================
-Ofast -march=native . 455.35 |================================================


Botan 2.17.3
Test: Twofish - Decrypt
MiB/s > Higher Is Better
-O0 .................. 43.50  |=====
-Og .................. 53.06  |======
-O1 .................. 52.84  |======
-O2 .................. 415.39 |============================================
-O2 -march=native .... 456.12 |================================================
-O3 .................. 416.22 |============================================
-O3 -march=native .... 455.31 |================================================
-Ofast ............... 413.78 |============================================
-Ofast -march=native . 455.78 |================================================


Botan 2.17.3
Test: Blowfish
MiB/s > Higher Is Better
-O0 .................. 45.45  |====
-Og .................. 55.90  |=====
-O1 .................. 57.32  |=====
-O2 .................. 527.44 |===============================================
-O2 -march=native .... 530.44 |================================================
-O3 .................. 527.82 |===============================================
-O3 -march=native .... 534.53 |================================================
-Ofast ............... 530.14 |================================================
-Ofast -march=native . 534.96 |================================================


Botan 2.17.3
Test: Blowfish - Decrypt
MiB/s > Higher Is Better
-O0 .................. 45.64  |====
-Og .................. 55.56  |=====
-O1 .................. 56.15  |=====
-O2 .................. 525.46 |===============================================
-O2 -march=native .... 530.10 |================================================
-O3 .................. 529.59 |================================================
-O3 -march=native .... 533.13 |================================================
-Ofast ............... 528.50 |================================================
-Ofast -march=native . 532.84 |================================================


Botan 2.17.3
Test: CAST-256
MiB/s > Higher Is Better
-O0 .................. 37.19  |==========
-Og .................. 47.14  |============
-O1 .................. 47.15  |============
-O2 .................. 181.79 |================================================
-O2 -march=native .... 180.53 |===============================================
-O3 .................. 182.49 |================================================
-O3 -march=native .... 180.56 |===============================================
-Ofast ............... 182.51 |================================================
-Ofast -march=native . 180.53 |===============================================


Botan 2.17.3
Test: CAST-256 - Decrypt
MiB/s > Higher Is Better
-O0 .................. 37.24  |==========
-Og .................. 47.00  |============
-O1 .................. 46.90  |============
-O2 .................. 180.70 |================================================
-O2 -march=native .... 180.08 |================================================
-O3 .................. 181.06 |================================================
-O3 -march=native .... 180.10 |================================================
-Ofast ............... 181.04 |================================================
-Ofast -march=native . 180.04 |================================================


Botan 2.17.3
Test: ChaCha20Poly1305 - Decrypt
MiB/s > Higher Is Better
-O0 .................. 76.18   |===
-Og .................. 199.21  |=======
-O1 .................. 198.39  |=======
-O2 .................. 1139.36 |=======================================
-O2 -march=native .... 1383.01 |===============================================
-O3 .................. 1161.26 |=======================================
-O3 -march=native .... 1384.38 |===============================================
-Ofast ............... 1105.61 |======================================
-Ofast -march=native . 1385.22 |===============================================


FLAC Audio Encoding 1.3.2
WAV To FLAC
Seconds < Lower Is Better
-O0 ........................ 53.917 |==========================================
-Og ........................ 8.410  |=======
-O1 ........................ 8.419  |=======
-O2 ........................ 7.581  |======
-O2 -flto .................. 7.563  |======
-O2 -march=native .......... 5.961  |=====
-O3 ........................ 7.581  |======
-O3 -flto .................. 7.565  |======
-O3 -march=native .......... 5.964  |=====
-O3 -march=native -flto .... 5.960  |=====
-Ofast ..................... 7.552  |======
-Ofast -march=native ....... 5.921  |=====
-Ofast -march=native -flto . 5.950  |=====


LAME MP3 Encoding 3.100
WAV To MP3
Seconds < Lower Is Better
-O0 ........................ 18.986 |==========================================
-Og ........................ 7.376  |================
-O1 ........................ 7.406  |================
-O2 ........................ 7.025  |================
-O2 -flto .................. 6.805  |===============
-O2 -march=native .......... 6.502  |==============
-O3 ........................ 7.035  |================
-O3 -flto .................. 6.770  |===============
-O3 -march=native .......... 6.468  |==============
-O3 -march=native -flto .... 6.181  |==============
-Ofast ..................... 6.818  |===============
-Ofast -march=native ....... 6.070  |=============
-Ofast -march=native -flto . 5.611  |============


Opus Codec Encoding 1.3.1
WAV To Opus Encode
Seconds < Lower Is Better
-O0 ..................... 24.959 |=============================================
-Og ..................... 6.563  |============
-O1 ..................... 6.564  |============
-O2 ..................... 6.162  |===========
-O2 -flto ............... 6.136  |===========
-O2 -march=native ....... 5.917  |===========
-O3 ..................... 6.178  |===========
-O3 -flto ............... 6.115  |===========
-O3 -march=native ....... 5.904  |===========
-O3 -march=native -flto . 5.858  |===========


eSpeak-NG Speech Engine 20200907
Text-To-Speech Synthesis
Seconds < Lower Is Better
-O0 ........................ 57.47 |===========================================
-Og ........................ 22.20 |=================
-O1 ........................ 22.23 |=================
-O2 ........................ 20.57 |===============
-O2 -flto .................. 20.18 |===============
-O2 -march=native .......... 18.90 |==============
-O3 ........................ 20.34 |===============
-O3 -flto .................. 19.92 |===============
-O3 -march=native .......... 18.84 |==============
-O3 -march=native -flto .... 19.17 |==============
-Ofast ..................... 20.47 |===============
-Ofast -march=native ....... 18.93 |==============
-Ofast -march=native -flto . 19.21 |==============


Timed HMMer Search 3.3.2
Pfam Database Search
Seconds < Lower Is Better
-O0 ........................ 660.18 |==========================================
-Og ........................ 159.49 |==========
-O1 ........................ 159.76 |==========
-O2 ........................ 155.60 |==========
-O2 -flto .................. 153.86 |==========
-O2 -march=native .......... 155.25 |==========
-O3 ........................ 155.06 |==========
-O3 -flto .................. 154.14 |==========
-O3 -march=native .......... 155.39 |==========
-O3 -march=native -flto .... 154.66 |==========
-Ofast ..................... 92.40  |======
-Ofast -march=native ....... 85.86  |=====
-Ofast -march=native -flto . 86.52  |======


Timed MrBayes Analysis 3.2.7
Primate Phylogeny Analysis
Seconds < Lower Is Better
-O0 ........................ 335.60 |==========================================
-Og ........................ 90.19  |===========
-O1 ........................ 90.74  |===========
-O2 ........................ 84.42  |===========
-O2 -flto .................. 83.77  |==========
-O2 -march=native .......... 83.55  |==========
-O3 ........................ 84.12  |===========
-O3 -flto .................. 83.63  |==========
-O3 -march=native .......... 83.05  |==========
-O3 -march=native -flto .... 83.88  |==========
-Ofast ..................... 71.93  |=========
-Ofast -march=native ....... 70.33  |=========
-Ofast -march=native -flto . 69.78  |=========


Coremark 1.0
CoreMark Size 666 - Iterations Per Second
Iterations/Sec > Higher Is Better
-O0 ........................ 97486.41  |==========
-Og ........................ 325450.38 |=================================
-O1 ........................ 325108.21 |=================================
-O2 ........................ 378934.91 |======================================
-O2 -flto .................. 380492.13 |======================================
-O2 -march=native .......... 356618.45 |====================================
-O3 ........................ 374050.27 |=====================================
-O3 -flto .................. 373170.83 |=====================================
-O3 -march=native .......... 368816.20 |=====================================
-O3 -march=native -flto .... 376057.21 |======================================
-Ofast ..................... 389536.84 |=======================================
-Ofast -march=native ....... 384134.18 |======================================
-Ofast -march=native -flto . 364497.97 |====================================


Zstd Compression 1.5.0
Compression Level: 3 - Compression Speed
MB/s > Higher Is Better
-O0 ........................ 987.8  |===============
-O0 ........................ 998.3  |===============
-Og ........................ 1878.9 |=============================
-O1 ........................ 1846.5 |============================
-O2 ........................ 2645.6 |========================================
-O2 -flto .................. 2658.3 |=========================================
-O2 -march=native .......... 2687.6 |=========================================
-O3 ........................ 2729.3 |==========================================
-O3 -flto .................. 2673.4 |=========================================
-O3 -march=native .......... 2715.4 |==========================================
-O3 -march=native -flto .... 2712.7 |==========================================
-Ofast ..................... 2688.6 |=========================================
-Ofast -march=native ....... 2744.7 |==========================================
-Ofast -march=native -flto . 2690.0 |=========================================


Zstd Compression 1.5.0
Compression Level: 8 - Compression Speed
MB/s > Higher Is Better
-O0 ........................ 181.0 |========================================
-Og ........................ 192.5 |===========================================
-O1 ........................ 191.6 |==========================================
-O2 ........................ 192.8 |===========================================
-O2 -flto .................. 192.2 |==========================================
-O2 -march=native .......... 192.0 |==========================================
-O3 ........................ 194.7 |===========================================
-O3 -flto .................. 192.2 |==========================================
-O3 -march=native .......... 193.3 |===========================================
-O3 -march=native -flto .... 193.9 |===========================================
-Ofast ..................... 193.4 |===========================================
-Ofast -march=native ....... 193.9 |===========================================
-Ofast -march=native -flto . 192.8 |===========================================


Zstd Compression 1.5.0
Compression Level: 8 - Decompression Speed
MB/s > Higher Is Better
-O0 ........................ 1224.3 |==========
-Og ........................ 3075.4 |=========================
-O1 ........................ 3062.6 |=========================
-O2 ........................ 5084.9 |=========================================
-O2 -flto .................. 5050.1 |=========================================
-O2 -march=native .......... 5157.6 |==========================================
-O3 ........................ 5072.9 |=========================================
-O3 -flto .................. 5070.1 |=========================================
-O3 -march=native .......... 5199.8 |==========================================
-O3 -march=native -flto .... 5186.4 |==========================================
-Ofast ..................... 5096.9 |=========================================
-Ofast -march=native ....... 5191.8 |==========================================
-Ofast -march=native -flto . 5159.7 |==========================================


Zstd Compression 1.5.0
Compression Level: 8, Long Mode - Compression Speed
MB/s > Higher Is Better
-O0 ........................ 249.7 |================================
-Og ........................ 289.6 |=====================================
-O1 ........................ 281.4 |====================================
-O2 ........................ 312.3 |========================================
-O2 -flto .................. 320.3 |=========================================
-O2 -march=native .......... 295.7 |======================================
-O3 ........................ 333.5 |===========================================
-O3 -flto .................. 316.2 |=========================================
-O3 -march=native .......... 295.3 |======================================
-O3 -march=native -flto .... 292.0 |======================================
-Ofast ..................... 326.7 |==========================================
-Ofast -march=native ....... 296.5 |======================================
-Ofast -march=native -flto . 290.0 |=====================================


Zstd Compression 1.5.0
Compression Level: 8, Long Mode - Decompression Speed
MB/s > Higher Is Better
-O0 ........................ 1356.7 |==========
-Og ........................ 3334.7 |=========================
-O1 ........................ 3340.9 |=========================
-O2 ........................ 5420.0 |=========================================
-O2 -flto .................. 5375.7 |=========================================
-O2 -march=native .......... 5469.6 |==========================================
-O3 ........................ 5395.1 |=========================================
-O3 -flto .................. 5381.6 |=========================================
-O3 -march=native .......... 5507.6 |==========================================
-O3 -march=native -flto .... 5516.5 |==========================================
-Ofast ..................... 5396.8 |=========================================
-Ofast -march=native ....... 5478.3 |==========================================
-Ofast -march=native -flto . 5501.8 |==========================================


Zstd Compression 1.5.0
Compression Level: 19, Long Mode - Compression Speed
MB/s > Higher Is Better
-O0 ........................ 18.4 |========================
-Og ........................ 29.2 |=======================================
-O1 ........................ 29.0 |======================================
-O2 ........................ 32.9 |============================================
-O2 -flto .................. 32.8 |===========================================
-O2 -march=native .......... 32.1 |===========================================
-O3 ........................ 32.8 |===========================================
-O3 -flto .................. 32.9 |============================================
-O3 -march=native .......... 33.2 |============================================
-O3 -march=native -flto .... 32.7 |===========================================
-Ofast ..................... 32.7 |===========================================
-Ofast -march=native ....... 33.2 |============================================
-Ofast -march=native -flto . 33.0 |============================================


Zstd Compression 1.5.0
Compression Level: 19, Long Mode - Decompression Speed
MB/s > Higher Is Better
-O0 ........................ 1187.4 |===========
-Og ........................ 2951.6 |===========================
-O1 ........................ 2952.8 |===========================
-O2 ........................ 4389.6 |========================================
-O2 -flto .................. 4406.7 |========================================
-O2 -march=native .......... 4471.4 |=========================================
-O3 ........................ 4495.8 |=========================================
-O3 -flto .................. 4502.2 |=========================================
-O3 -march=native .......... 4517.4 |=========================================
-O3 -march=native -flto .... 4562.6 |==========================================
-Ofast ..................... 4477.0 |=========================================
-Ofast -march=native ....... 4532.6 |==========================================
-Ofast -march=native -flto . 4583.9 |==========================================


Zstd Compression 1.5.0
Compression Level: 3 - Decompression Speed
MB/s > Higher Is Better
-Og ........................ 2895.1 |========================
-O1 ........................ 2890.5 |========================
-O2 ........................ 4902.2 |=========================================
-O2 -flto .................. 4863.0 |=========================================
-O2 -march=native .......... 4959.1 |==========================================
-O3 ........................ 4888.9 |=========================================
-O3 -flto .................. 4846.5 |=========================================
-O3 -march=native .......... 4961.1 |==========================================
-O3 -march=native -flto .... 4966.2 |==========================================
-Ofast ..................... 4850.4 |=========================================
-Ofast -march=native ....... 4967.7 |==========================================
-Ofast -march=native -flto . 4960.0 |==========================================


AOBench
Size: 2048 x 2048 - Total Time
Seconds < Lower Is Better
-O0 ........................ 40.46 |===========================================
-Og ........................ 37.46 |========================================
-O1 ........................ 37.49 |========================================
-O2 ........................ 25.04 |===========================
-O2 -flto .................. 24.84 |==========================
-O2 -march=native .......... 24.65 |==========================
-O3 ........................ 24.41 |==========================
-O3 -flto .................. 24.22 |==========================
-O3 -march=native .......... 22.95 |========================
-O3 -march=native -flto .... 22.89 |========================
-Ofast ..................... 23.45 |=========================
-Ofast -march=native ....... 21.67 |=======================
-Ofast -march=native -flto . 21.57 |=======================


GraphicsMagick 1.3.33
Operation: Swirl
Iterations Per Minute > Higher Is Better
-O0 ........................ 364 |=========================
-Og ........................ 603 |=========================================
-O1 ........................ 604 |=========================================
-O2 ........................ 621 |==========================================
-O2 -flto .................. 618 |==========================================
-O2 -march=native .......... 659 |============================================
-O3 ........................ 639 |===========================================
-O3 -flto .................. 599 |========================================
-O3 -march=native .......... 652 |============================================
-O3 -march=native -flto .... 657 |============================================
-Ofast ..................... 628 |==========================================
-Ofast -march=native ....... 667 |=============================================
-Ofast -march=native -flto . 665 |=============================================


GraphicsMagick 1.3.33
Operation: Sharpen
Iterations Per Minute > Higher Is Better
-O0 ........................ 52  |============
-Og ........................ 163 |=====================================
-O1 ........................ 164 |======================================
-O2 ........................ 163 |=====================================
-O2 -flto .................. 162 |=====================================
-O2 -march=native .......... 163 |=====================================
-O3 ........................ 163 |=====================================
-O3 -flto .................. 162 |=====================================
-O3 -march=native .......... 163 |=====================================
-O3 -march=native -flto .... 162 |=====================================
-Ofast ..................... 163 |=====================================
-Ofast -march=native ....... 194 |=============================================
-Ofast -march=native -flto . 196 |=============================================


GraphicsMagick 1.3.33
Operation: Enhanced
Iterations Per Minute > Higher Is Better
-O0 ........................ 84  |===========
-Og ........................ 218 |=============================
-O1 ........................ 219 |=============================
-O2 ........................ 218 |=============================
-O2 -flto .................. 219 |=============================
-O2 -march=native .......... 250 |=================================
-O3 ........................ 233 |===============================
-O3 -flto .................. 232 |===============================
-O3 -march=native .......... 254 |==================================
-O3 -march=native -flto .... 254 |==================================
-Ofast ..................... 255 |==================================
-Ofast -march=native ....... 334 |============================================
-Ofast -march=native -flto . 338 |=============================================


GraphicsMagick 1.3.33
Operation: Resizing
Iterations Per Minute > Higher Is Better
-O0 ........................ 398  |=============
-Og ........................ 1048 |===================================
-O1 ........................ 1046 |===================================
-O2 ........................ 1066 |====================================
-O2 -flto .................. 1064 |====================================
-O2 -march=native .......... 1076 |====================================
-O3 ........................ 1070 |====================================
-O3 -flto .................. 1058 |===================================
-O3 -march=native .......... 1070 |====================================
-O3 -march=native -flto .... 1214 |=========================================
-Ofast ..................... 1066 |====================================
-Ofast -march=native ....... 1231 |=========================================
-Ofast -march=native -flto . 1317 |============================================


GraphicsMagick 1.3.33
Operation: Noise-Gaussian
Iterations Per Minute > Higher Is Better
-O0 ........................ 198 |=========================
-Og ........................ 261 |=================================
-O1 ........................ 260 |=================================
-O2 ........................ 288 |=====================================
-O2 -flto .................. 285 |====================================
-O2 -march=native .......... 290 |=====================================
-O3 ........................ 289 |=====================================
-O3 -flto .................. 284 |====================================
-O3 -march=native .......... 291 |=====================================
-O3 -march=native -flto .... 288 |=====================================
-Ofast ..................... 333 |==========================================
-Ofast -march=native ....... 353 |=============================================
-Ofast -march=native -flto . 352 |=============================================


GraphicsMagick 1.3.33
Operation: HWB Color Space
Iterations Per Minute > Higher Is Better
-O0 ........................ 728  |=====================
-Og ........................ 1148 |=================================
-O1 ........................ 1145 |=================================
-O2 ........................ 1137 |=================================
-O2 -flto .................. 1160 |=================================
-O2 -march=native .......... 1200 |===================================
-O3 ........................ 1161 |=================================
-O3 -flto .................. 1150 |=================================
-O3 -march=native .......... 1201 |===================================
-O3 -march=native -flto .... 1487 |===========================================
-Ofast ..................... 1192 |==================================
-Ofast -march=native ....... 1194 |==================================
-Ofast -march=native -flto . 1525 |============================================


dav1d 0.9.0
Video Input: Summer Nature 4K
FPS > Higher Is Better
-O0 .................. 145.61 |====================================
-Og .................. 187.55 |==============================================
-O1 .................. 186.84 |==============================================
-O2 .................. 193.12 |===============================================
-O2 -march=native .... 193.01 |===============================================
-O3 .................. 195.62 |================================================
-O3 -march=native .... 192.88 |===============================================
-Ofast ............... 194.41 |================================================
-Ofast -march=native . 193.33 |===============================================


C-Ray 1.1
Total Time - 4K, 16 Rays Per Pixel
Seconds < Lower Is Better
-O0 ........................ 171.39 |==========================================
-Og ........................ 96.46  |========================
-O1 ........................ 96.48  |========================
-O2 ........................ 82.74  |====================
-O2 -flto .................. 82.45  |====================
-O2 -march=native .......... 83.79  |=====================
-O3 ........................ 82.63  |====================
-O3 -flto .................. 82.47  |====================
-O3 -march=native .......... 84.11  |=====================
-O3 -march=native -flto .... 85.09  |=====================
-Ofast ..................... 79.00  |===================
-Ofast -march=native ....... 72.81  |==================
-Ofast -march=native -flto . 58.23  |==============


Liquid-DSP 2021.01.31
Threads: 1 - Buffer Length: 256 - Filter Length: 57
samples/s > Higher Is Better
-O0 ........................ 11450667  |====
-Og ........................ 95298667  |==================================
-O1 ........................ 94182000  |=================================
-O2 ........................ 105903333 |=====================================
-O2 -flto .................. 104753333 |=====================================
-O2 -march=native .......... 102110000 |====================================
-O3 ........................ 105886667 |=====================================
-O3 -flto .................. 104606667 |=====================================
-O3 -march=native .......... 101400000 |====================================
-O3 -march=native -flto .... 99767333  |===================================
-Ofast ..................... 107380000 |======================================
-Ofast -march=native ....... 110166667 |=======================================
-Ofast -march=native -flto . 104980000 |=====================================


Liquid-DSP 2021.01.31
Threads: 2 - Buffer Length: 256 - Filter Length: 57
samples/s > Higher Is Better
-O0 ........................ 22331333  |====
-Og ........................ 178793333 |=================================
-O1 ........................ 179226667 |=================================
-O2 ........................ 205543333 |======================================
-O2 -flto .................. 201630000 |=====================================
-O2 -march=native .......... 196936667 |====================================
-O3 ........................ 202626667 |=====================================
-O3 -flto .................. 202666667 |=====================================
-O3 -march=native .......... 195343333 |====================================
-O3 -march=native -flto .... 192306667 |===================================
-Ofast ..................... 208273333 |======================================
-Ofast -march=native ....... 212133333 |=======================================
-Ofast -march=native -flto . 202483333 |=====================================


Liquid-DSP 2021.01.31
Threads: 4 - Buffer Length: 256 - Filter Length: 57
samples/s > Higher Is Better
-O0 ........................ 42848667  |====
-Og ........................ 346526667 |=================================
-O1 ........................ 342970000 |=================================
-O2 ........................ 391130000 |=====================================
-O2 -flto .................. 386256667 |=====================================
-O2 -march=native .......... 376603333 |====================================
-O3 ........................ 391986667 |=====================================
-O3 -flto .................. 387470000 |=====================================
-O3 -march=native .......... 374240000 |====================================
-O3 -march=native -flto .... 370076667 |===================================
-Ofast ..................... 397066667 |======================================
-Ofast -march=native ....... 408440000 |=======================================
-Ofast -march=native -flto . 390976667 |=====================================


Liquid-DSP 2021.01.31
Threads: 8 - Buffer Length: 256 - Filter Length: 57
samples/s > Higher Is Better
-O0 ........................ 80727667  |====
-Og ........................ 649286667 |=================================
-O1 ........................ 646840000 |=================================
-O2 ........................ 739403333 |=====================================
-O2 -flto .................. 733313333 |=====================================
-O2 -march=native .......... 712083333 |====================================
-O3 ........................ 741773333 |=====================================
-O3 -flto .................. 724186000 |====================================
-O3 -march=native .......... 705703333 |====================================
-O3 -march=native -flto .... 695526667 |===================================
-Ofast ..................... 756216667 |======================================
-Ofast -march=native ....... 774446667 |=======================================
-Ofast -march=native -flto . 734670000 |=====================================


Liquid-DSP 2021.01.31
Threads: 16 - Buffer Length: 256 - Filter Length: 57
samples/s > Higher Is Better
-O0 ........................ 91345333  |====
-Og ........................ 732756667 |=================================
-O1 ........................ 732983333 |=================================
-O2 ........................ 813496667 |=====================================
-O2 -flto .................. 809356667 |=====================================
-O2 -march=native .......... 768323333 |===================================
-O3 ........................ 811966667 |=====================================
-O3 -flto .................. 808723333 |=====================================
-O3 -march=native .......... 768456667 |===================================
-O3 -march=native -flto .... 754270000 |==================================
-Ofast ..................... 838300000 |======================================
-Ofast -march=native ....... 856410000 |=======================================
-Ofast -march=native -flto . 843853333 |======================================


SQLite Speedtest 3.30
Timed Time - Size 1,000
Seconds < Lower Is Better
-O0 ........................ 80.61 |===========================================
-Og ........................ 53.80 |=============================
-O1 ........................ 53.88 |=============================
-O2 ........................ 47.36 |=========================
-O2 -flto .................. 47.10 |=========================
-O2 -march=native .......... 47.41 |=========================
-O3 ........................ 46.79 |=========================
-O3 -flto .................. 47.01 |=========================
-O3 -march=native .......... 48.39 |==========================
-O3 -march=native -flto .... 47.76 |=========================
-Ofast ..................... 47.10 |=========================
-Ofast -march=native ....... 47.21 |=========================
-Ofast -march=native -flto . 47.67 |=========================


PJSIP 2.11
Method: OPTIONS, Stateless
Responses Per Second > Higher Is Better
-O0 .................. 204093 |======================================
-Og .................. 241977 |=============================================
-O1 .................. 241249 |=============================================
-O2 .................. 251850 |===============================================
-O2 -march=native .... 252124 |===============================================
-O3 .................. 254783 |================================================
-O3 -march=native .... 255491 |================================================
-Ofast ............... 255668 |================================================
-Ofast -march=native . 253922 |================================================