The Computer Language
24.11 Benchmarks Game

C gcc versus Intel Fortran fastest performance

How the programs are written matters! Always look at the source code.

If the fastest programs are * hand-written vector instructions, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code.

fannkuch-redux
source secs mem gz cpu secs
* C gcc #6 2.14 19,704 1582 8.43
* C gcc #4 14.04 19,704 1190 14.03
C gcc #5 7.29 19,704 917 28.25
C gcc #3 36.80 19,704 574 36.79
Intel Fortran #3 9.78 19,648 1164 39.00
C gcc #8 39.33 19,492 483 39.32
C gcc 39.61 19,704 514 39.60
* C gcc #2 10.19 19,704 1563 39.99
Intel Fortran 40.33 19,648 608 40.33
n-body
source secs mem gz cpu secs
* C gcc #9 2.10 19,772 1639 2.10
Intel Fortran #5 3.39 19,648 1669 3.39
* C gcc #4 4.05 19,772 1398 4.05
Intel Fortran #2 4.46 19,776 1507 4.46
Intel Fortran 4.55 19,648 1400 4.55
Intel Fortran #3 4.71 19,648 1311 4.71
C gcc #6 4.97 19,772 1186 4.97
Intel Fortran #6 5.01 19,648 1530 5.01
C gcc #2 5.19 19,772 1270 5.19
C gcc #3 5.23 19,772 1214 5.23
C gcc 5.23 19,772 1179 5.23
* C gcc #5 5.43 19,772 1436 5.43
C gcc #8 5.54 19,492 1193 5.54
C gcc #7 6.89 19,772 1250 6.88
Intel Fortran #4   Bad Output  
spectral-norm
source secs mem gz cpu secs
* C gcc #6 0.40 19,772 1203 1.59
Intel Fortran #2 2.67 19,648 520 2.66
* C gcc #5 0.72 19,772 576 2.85
* C gcc #7 0.72 19,772 906 2.85
* C gcc #4 0.72 19,772 1145 2.85
Intel Fortran #3 0.73 19,648 644 2.88
C gcc #8 5.40 19,772 389 5.39
C gcc #3 1.43 19,772 470 5.70
* C gcc #2   Make Error  
mandelbrot
source secs mem gz cpu secs
* C gcc #6 1.28 33,400 1147 5.10
C gcc #5 1.63 33,512 788 6.31
Intel Fortran #6 2.71 79,488 669 8.55
* C gcc #4 3.52 33,060 805 13.89
* C gcc 3.49 32,864 828 13.92
* C gcc #7 3.51 33,276 1000 13.95
* C gcc #3 3.53 32,860 769 14.09
C gcc #9 4.07 33,128 700 15.70
Intel Fortran #7 4.08 79,508 965 16.18
C gcc #8 25.15 19,496 412 25.15
Intel Fortran #4 9.85 79,744 626 25.23
Intel Fortran #5 32.58 43,648 528 32.58
fasta
source secs mem gz cpu secs
C gcc #3 0.78 19,772 1469 0.78
C gcc #5 1.24 19,616 1286 1.24
Intel Fortran #4 1.34 19,648 1355 1.34
C gcc #2 2.77 19,772 1299 2.76
C gcc #6 0.94 19,772 1936 2.78
C gcc #7 0.82 19,772 2276 3.24
C gcc 3.70 19,772 1213 3.70
C gcc #8 4.62 19,772 825 4.62
Intel Fortran 5.83 19,648 1193 5.83
Intel Fortran #3 6.19 19,648 1217 6.19
C gcc #4   Make Error  
k-nucleotide
source secs mem gz cpu secs
C gcc 3.84 130,408 1512 12.45
Intel Fortran   Make Error  
reverse-complement
source secs mem gz cpu secs
* C gcc #7 0.44 499,992 1899 0.59
C gcc #9 0.48 500,032 1551 0.76
C gcc #6 0.96 675,260 828 1.36
C gcc #5 1.53 994,108 654 1.53
C gcc #2 1.06 994,536 757 1.58
Intel Fortran 3.33 986,304 1026 3.33
* C gcc #4 3.70 500,452 716 3.69
Intel Fortran #2 42.90 769,748 778 42.89
binary-trees
source secs mem gz cpu secs
C gcc #2 1.53 169,284 816 4.18
C gcc #3 1.96 134,540 842 4.70
Intel Fortran #2 2.22 140,544 1155 6.86
C gcc #8 21.08 285,544 607 21.08
C gcc 21.67 264,244 660 21.67
C gcc #5 8.77 351,332 914 31.93
Intel Fortran 32.59 525,824 780 32.59
pidigits
source secs mem gz cpu secs
C gcc #2 0.74 19,772 422 0.74
C gcc 0.74 19,772 459 0.74
Intel Fortran #4 0.88 19,648 987 0.88
regex-redux
source secs mem gz cpu secs
C gcc #5 0.81 152,500 1403 2.03
Intel Fortran 0.96 179,724 2229 3.09
C gcc #2 3.21 103,288 1121 3.21
C gcc #4 0.97 152,264 1237 3.28
C gcc #3 1.72 103,736 1273 3.31
C gcc

gcc (Ubuntu 14.2.0-4ubuntu2) 14.2.0

Intel Fortran

ifx (IFX)
2024.1.0 20240308