Julia versus C gcc fastest programs Always look at the source code. These are only the fastest programs. Do some of them use manually vectorized SIMD? Look at the other programs. They may seem more-like a fair comparison to you. fannkuch-redux source secs mem gz busy cpu load Julia 7.64 206,244 1067 28.95 95% 95% 94% 95% C gcc 7.58 872 910 29.61 100% 98% 99% 93% mandelbrot source secs mem gz busy cpu load Julia 1.32 227,836 624 4.66 98% 86% 85% 85% C gcc 1.27 31,792 1135 5.08 100% 100% 99% 100% pidigits source secs mem gz busy cpu load Julia 0.97 172,908 506 1.24 10% 98% 10% 9% C gcc 0.81 2,804 416 0.84 1% 2% 99% 1% k-nucleotide source secs mem gz busy cpu load Julia 5.12 374,876 951 11.36 63% 72% 38% 49% C gcc 3.72 130,260 1506 12.07 100% 89% 78% 57% fasta source secs mem gz busy cpu load Julia 1.12 193,924 1082 1.40 10% 8% 99% 8% C gcc 0.78 1,156 1463 0.78 0% 0% 0% 100% reverse-complement source secs mem gz busy cpu load Julia 1.60 677,796 522 1.91 6% 6% 100% 9% C gcc 0.86 712,208 820 1.27 99% 28% 1% 19% n-body source secs mem gz busy cpu load Julia 4.05 218,740 1111 4.36 3% 2% 3% 100% C gcc 2.18 768 1633 2.19 0% 100% 0% 0% regex-redux source secs mem gz busy cpu load Julia 1.68 394,324 759 3.06 99% 7% 5% 71% C gcc 0.80 152,172 1397 2.01 52% 99% 48% 53% spectral-norm source secs mem gz busy cpu load Julia 1.11 182,068 429 3.74 80% 79% 80% 98% C gcc 0.40 872 1197 1.58 100% 100% 100% 98% binary-trees source secs mem gz busy cpu load Julia 7.43 482,620 634 23.65 69% 100% 78% 72% C gcc 1.54 168,832 809 4.35 60% 67% 57% 100% Julia julia version 1.6.0 C gcc gcc (Ubuntu 10.3.0-1ubuntu1) 10.3.0 all Julia programs & measurements all C gcc programs & measurements