Scimark Macbook Pro Retina 2012 Clang 6 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 Xcode 10 O2: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 Xcode 10 O3: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 Xcode 10 Ofast: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 Xcode 10 O2 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 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 Xcode 10 GCC 6: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 6 O2: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 6 O3: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 6 Ofast: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 6 O2 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 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 7 O2: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 7 O2 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 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 7 O3: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 7 Ofast: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 8: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 8 O2: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC O3: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 8 Ofast: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 8 O2 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 10.13.6, Kernel: 17.7.0 (x86_64), Display Server: X Server 1.18.4, OpenGL: 2.1, Compiler: Clang 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 9: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 9 O2: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 9 O3: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 GCC 9 Ofast: 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 8.0.0 + GCC 4.2.1 + LLVM 8.0.0 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 Clang 6: 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 6.0.1 + GCC 4.2.1 + LLVM 6.0.1 + Xcode 10.1 + CUDA 10.1, File-System: MS-DOS FAT16, Screen Resolution: 2880x1800 SciMark 2.0 Computational Test: Composite Mflops > Higher Is Better Xcode 10 .................... 533 |=============== Xcode 10 O2 ................. 1439 |========================================= Xcode 10 O3 ................. 1479 |========================================== Xcode 10 Ofast .............. 1505 |=========================================== Xcode 10 O2 march=ivybridge . 1435 |========================================= Xcode 10 GCC 6 .............. 489 |============== GCC 6 O2 .................... 1227 |=================================== GCC 6 O3 .................... 1416 |======================================== GCC 6 Ofast ................. 1459 |========================================== GCC 6 O2 march=ivybridge .... 1237 |=================================== GCC 7 ....................... 485 |============== GCC 7 O2 .................... 1207 |================================== GCC 7 O2 march=ivybridge .... 1237 |=================================== GCC 7 O3 .................... 1252 |==================================== GCC 7 Ofast ................. 1425 |========================================= GCC 8 ....................... 483 |============== GCC 8 O2 .................... 1245 |==================================== GCC O3 ...................... 1321 |====================================== GCC 8 Ofast ................. 1329 |====================================== GCC 8 O2 march=ivybridge .... 1225 |=================================== GCC 9 ....................... 483 |============== GCC 9 O2 .................... 1200 |================================== GCC 9 O3 .................... 1321 |====================================== GCC 9 Ofast ................. 1331 |====================================== Clang 6 ..................... 529 |=============== SciMark 2.0 Computational Test: Monte Carlo Mflops > Higher Is Better Xcode 10 .................... 104 |========= Xcode 10 O2 ................. 409 |================================== Xcode 10 O3 ................. 471 |======================================= Xcode 10 Ofast .............. 408 |================================= Xcode 10 O2 march=ivybridge . 464 |====================================== Xcode 10 GCC 6 .............. 104 |========= GCC 6 O2 .................... 495 |========================================= GCC 6 O3 .................... 496 |========================================= GCC 6 Ofast ................. 514 |========================================== GCC 6 O2 march=ivybridge .... 525 |=========================================== GCC 7 ....................... 105 |========= GCC 7 O2 .................... 494 |========================================= GCC 7 O2 march=ivybridge .... 494 |========================================= GCC 7 O3 .................... 438 |==================================== GCC 7 Ofast ................. 509 |========================================== GCC 8 ....................... 106 |========= GCC 8 O2 .................... 504 |========================================= GCC O3 ...................... 427 |=================================== GCC 8 Ofast ................. 536 |============================================ GCC 8 O2 march=ivybridge .... 430 |=================================== GCC 9 ....................... 108 |========= GCC 9 O2 .................... 477 |======================================= GCC 9 O3 .................... 476 |======================================= GCC 9 Ofast ................. 512 |========================================== Clang 6 ..................... 100 |======== SciMark 2.0 Computational Test: Fast Fourier Transform Mflops > Higher Is Better Xcode 10 .................... 163 |======================== Xcode 10 O2 ................. 284 |========================================== Xcode 10 O3 ................. 298 |============================================ Xcode 10 Ofast .............. 294 |=========================================== Xcode 10 O2 march=ivybridge . 292 |=========================================== Xcode 10 GCC 6 .............. 153 |====================== GCC 6 O2 .................... 301 |============================================ GCC 6 O3 .................... 299 |============================================ GCC 6 Ofast ................. 296 |=========================================== GCC 6 O2 march=ivybridge .... 294 |=========================================== GCC 7 ....................... 158 |======================= GCC 7 O2 .................... 291 |=========================================== GCC 7 O2 march=ivybridge .... 299 |============================================ GCC 7 O3 .................... 277 |======================================== GCC 7 Ofast ................. 296 |=========================================== GCC 8 ....................... 158 |======================= GCC 8 O2 .................... 296 |=========================================== GCC O3 ...................... 296 |=========================================== GCC 8 Ofast ................. 292 |=========================================== GCC 8 O2 march=ivybridge .... 297 |=========================================== GCC 9 ....................... 153 |====================== GCC 9 O2 .................... 291 |=========================================== GCC 9 O3 .................... 293 |=========================================== GCC 9 Ofast ................. 292 |=========================================== Clang 6 ..................... 162 |======================== SciMark 2.0 Computational Test: Sparse Matrix Multiply Mflops > Higher Is Better Xcode 10 .................... 601 |============= Xcode 10 O2 ................. 1801 |======================================= Xcode 10 O3 ................. 1897 |========================================= Xcode 10 Ofast .............. 1905 |========================================= Xcode 10 O2 march=ivybridge . 1885 |========================================= Xcode 10 GCC 6 .............. 519 |=========== GCC 6 O2 .................... 1929 |========================================= GCC 6 O3 .................... 1960 |========================================== GCC 6 Ofast ................. 1992 |=========================================== GCC 6 O2 march=ivybridge .... 1951 |========================================== GCC 7 ....................... 518 |=========== GCC 7 O2 .................... 1869 |======================================== GCC 7 O2 march=ivybridge .... 1930 |========================================== GCC 7 O3 .................... 1779 |====================================== GCC 7 Ofast ................. 1856 |======================================== GCC 8 ....................... 515 |=========== GCC 8 O2 .................... 1983 |=========================================== GCC O3 ...................... 1992 |=========================================== GCC 8 Ofast ................. 1923 |========================================= GCC 8 O2 march=ivybridge .... 1999 |=========================================== GCC 9 ....................... 518 |=========== GCC 9 O2 .................... 1860 |======================================== GCC 9 O3 .................... 1939 |========================================== GCC 9 Ofast ................. 1996 |=========================================== Clang 6 ..................... 594 |============= SciMark 2.0 Computational Test: Dense LU Matrix Factorization Mflops > Higher Is Better Xcode 10 .................... 828 |=========== Xcode 10 O2 ................. 3227 |========================================= Xcode 10 O3 ................. 3345 |=========================================== Xcode 10 Ofast .............. 3351 |=========================================== Xcode 10 O2 march=ivybridge . 3162 |========================================= Xcode 10 GCC 6 .............. 698 |========= GCC 6 O2 .................... 2433 |=============================== GCC 6 O3 .................... 2937 |====================================== GCC 6 Ofast ................. 2929 |====================================== GCC 6 O2 march=ivybridge .... 2441 |=============================== GCC 7 ....................... 690 |========= GCC 7 O2 .................... 2327 |============================== GCC 7 O2 march=ivybridge .... 2482 |================================ GCC 7 O3 .................... 2580 |================================= GCC 7 Ofast ................. 2884 |===================================== GCC 8 ....................... 687 |========= GCC 8 O2 .................... 2464 |================================ GCC O3 ...................... 2500 |================================ GCC 8 Ofast ................. 2498 |================================ GCC 8 O2 march=ivybridge .... 2424 |=============================== GCC 9 ....................... 688 |========= GCC 9 O2 .................... 2399 |=============================== GCC 9 O3 .................... 2517 |================================ GCC 9 Ofast ................. 2459 |================================ Clang 6 ..................... 830 |=========== SciMark 2.0 Computational Test: Jacobi Successive Over-Relaxation Mflops > Higher Is Better Xcode 10 .................... 968 |=========================== Xcode 10 O2 ................. 1340 |===================================== Xcode 10 O3 ................. 1384 |====================================== Xcode 10 Ofast .............. 1567 |=========================================== Xcode 10 O2 march=ivybridge . 1374 |====================================== Xcode 10 GCC 6 .............. 969 |=========================== GCC 6 O2 .................... 976 |=========================== GCC 6 O3 .................... 1386 |====================================== GCC 6 Ofast ................. 1564 |=========================================== GCC 6 O2 march=ivybridge .... 974 |=========================== GCC 7 ....................... 955 |========================== GCC 7 O2 .................... 978 |=========================== GCC 7 O2 march=ivybridge .... 978 |=========================== GCC 7 O3 .................... 1185 |================================= GCC 7 Ofast ................. 1554 |=========================================== GCC 8 ....................... 951 |========================== GCC 8 O2 .................... 978 |=========================== GCC O3 ...................... 1391 |====================================== GCC 8 Ofast ................. 1395 |====================================== GCC 8 O2 march=ivybridge .... 976 |=========================== GCC 9 ....................... 950 |========================== GCC 9 O2 .................... 974 |=========================== GCC 9 O3 .................... 1379 |====================================== GCC 9 Ofast ................. 1396 |====================================== Clang 6 ..................... 957 |==========================