Comparaison build LLVM 8 build different way
GCC 8.3.0 Mojave ivybridge pipe lto align -ipa-pta


Xcode 10: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 7.0.1 + GCC 4.2.1 + LLVM 7.0.1 + Xcode 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800

GCC 8.2.0: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 7.0.1 + GCC 4.2.1 + LLVM 7.0.1 + Xcode 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800

LLVM 7.0.1: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 7.0.1 + GCC 4.2.1 + LLVM 7.0.1 + Xcode 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800

LLVM 8 Build with LLVM 7: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 7.0.1 + GCC 4.2.1 + LLVM 7.0.1 + Xcode 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800

LLVM 8 Build with Xcode 10: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 7.0.1 + GCC 4.2.1 + LLVM 7.0.1 + Xcode 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800

Xcode 10.1 Mojave: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.14.4, Kernel: 18.5.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Apple LLVM 10.0.1 (clang-1001.0.46.4) + GCC 4.2.1 + Xcode 10.2.1, File-System: APFS, Screen Resolution: 2880x1800

Xcode 10.1 Mojave march=ivybridge: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.14.4, Kernel: 18.5.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Apple LLVM 10.0.1 (clang-1001.0.46.4) + GCC 4.2.1 + Xcode 10.2.1, File-System: APFS, Screen Resolution: 2880x1800

GCC 8.3.0: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.14.4, Kernel: 18.5.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Apple LLVM 10.0.1 (clang-1001.0.46.4) + GCC 4.2.1 + Xcode 10.2.1, File-System: APFS, Screen Resolution: 2880x1800

GCC 8.3.0 Mojave march=ivybridge: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.14.4, Kernel: 18.5.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Apple LLVM 10.0.1 (clang-1001.0.46.4) + GCC 4.2.1 + Xcode 10.2.1, File-System: APFS, Screen Resolution: 2880x1800

GCC 8.3.0 Mojave ivybridge pipe lto align: 

	Processor: Intel Core i7 @ 2.30GHz (4 Cores / 8 Threads), Motherboard: Apple MacBook Pro, Chipset: Intel 7, Memory: 2 x 4 GB DDR3-1600MHz, Disk: 251GB APPLE SSD SM256E, Graphics: Intel HD 4000 + NVIDIA GeForce GT 650M 2GB, Monitor: Color LCD

	OS: macOS 10.14.4, Kernel: 18.5.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Apple LLVM 10.0.1 (clang-1001.0.46.4) + GCC 4.2.1 + Xcode 10.2.1, File-System: APFS, Screen Resolution: 2880x1800


GraphicsMagick 1.3.30
Operation: Sharpen
Iterations Per Minute > Higher Is Better
Xcode 10 .................................. 47  |============
GCC 8.2.0 ................................. 110 |=============================
LLVM 7.0.1 ................................ 47  |============
LLVM 8 Build with LLVM 7 .................. 47  |============
LLVM 8 Build with Xcode 10 ................ 47  |============
Xcode 10.1 Mojave ......................... 45  |============
Xcode 10.1 Mojave march=ivybridge ......... 19  |=====
GCC 8.3.0 ................................. 113 |==============================
GCC 8.3.0 Mojave march=ivybridge .......... 45  |============
GCC 8.3.0 Mojave ivybridge pipe lto align . 111 |=============================


GraphicsMagick 1.3.30
Operation: Resizing
Iterations Per Minute > Higher Is Better
Xcode 10 .................................. 96  |=================
GCC 8.2.0 ................................. 163 |=============================
LLVM 7.0.1 ................................ 96  |=================
LLVM 8 Build with LLVM 7 .................. 99  |==================
LLVM 8 Build with Xcode 10 ................ 99  |==================
Xcode 10.1 Mojave ......................... 92  |=================
Xcode 10.1 Mojave march=ivybridge ......... 39  |=======
GCC 8.3.0 ................................. 165 |==============================
GCC 8.3.0 Mojave march=ivybridge .......... 82  |===============
GCC 8.3.0 Mojave ivybridge pipe lto align . 167 |==============================


GraphicsMagick 1.3.30
Operation: HWB Color Space
Iterations Per Minute > Higher Is Better
Xcode 10 .................................. 129 |====================
GCC 8.2.0 ................................. 184 |=============================
LLVM 7.0.1 ................................ 130 |=====================
LLVM 8 Build with LLVM 7 .................. 131 |=====================
LLVM 8 Build with Xcode 10 ................ 131 |=====================
Xcode 10.1 Mojave ......................... 124 |====================
Xcode 10.1 Mojave march=ivybridge ......... 60  |==========
GCC 8.3.0 ................................. 189 |==============================
GCC 8.3.0 Mojave march=ivybridge .......... 103 |================
GCC 8.3.0 Mojave ivybridge pipe lto align . 187 |==============================


7-Zip Compression 16.02
Compress Speed Test
MIPS > Higher Is Better
Xcode 10 .................................. 19036 |============================
GCC 8.2.0 ................................. 18212 |===========================
Xcode 10.1 Mojave ......................... 17626 |==========================
Xcode 10.1 Mojave march=ivybridge ......... 18409 |===========================
GCC 8.3.0 ................................. 18567 |===========================
GCC 8.3.0 Mojave march=ivybridge .......... 18605 |===========================
GCC 8.3.0 Mojave ivybridge pipe lto align . 18134 |===========================


Timed Apache Compilation 2.4.7
Time To Compile
Seconds < Lower Is Better
Xcode 10 .......................... 48.55 |=============================
LLVM 8 Build with Xcode 10 ........ 60.60 |====================================
Xcode 10.1 Mojave ................. 48.22 |=============================
Xcode 10.1 Mojave march=ivybridge . 29.23 |=================


Timed ImageMagick Compilation 6.9.0
Time To Compile
Seconds < Lower Is Better
Xcode 10 .................................. 73.44  |===============
GCC 8.2.0 ................................. 131.83 |===========================
LLVM 7.0.1 ................................ 107.16 |======================
LLVM 8 Build with LLVM 7 .................. 131.37 |===========================
LLVM 8 Build with Xcode 10 ................ 125.89 |==========================
Xcode 10.1 Mojave ......................... 80.24  |================
Xcode 10.1 Mojave march=ivybridge ......... 30.74  |======
GCC 8.3.0 ................................. 126.44 |==========================
GCC 8.3.0 Mojave march=ivybridge .......... 53.35  |===========
GCC 8.3.0 Mojave ivybridge pipe lto align . 110.26 |=======================


Timed PHP Compilation 7.1.9
Time To Compile
Seconds < Lower Is Better
Xcode 10 ................... 171 |============================
GCC 8.2.0 .................. 209 |==================================
LLVM 7.0.1 ................. 244 |========================================
LLVM 8 Build with LLVM 7 ... 274 |=============================================
LLVM 8 Build with Xcode 10 . 267 |============================================


C-Ray 1.1
Total Time - 4K, 16 Rays Per Pixel
Seconds < Lower Is Better
Xcode 10 .................................. 368 |======================
GCC 8.2.0 ................................. 304 |===================
Xcode 10.1 Mojave ......................... 370 |=======================
Xcode 10.1 Mojave march=ivybridge ......... 336 |====================
GCC 8.3.0 ................................. 304 |===================
GCC 8.3.0 Mojave march=ivybridge .......... 304 |===================
GCC 8.3.0 Mojave ivybridge pipe lto align . 492 |==============================