Go versus Java 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. regex-redux source secs mem gz busy cpu load Go 3.85 324,200 810 6.01 27% 19% 20% 91% Java 5.31 793,572 929 17.50 79% 78% 83% 89% fannkuch-redux source secs mem gz busy cpu load Go 8.31 2,316 969 33.23 100% 100% 100% 100% Java 10.38 35,388 1282 40.84 99% 99% 98% 97% reverse-complement source secs mem gz busy cpu load Go 1.35 1,560,228 996 2.24 24% 35% 10% 99% Java 1.53 687,864 2183 3.50 80% 46% 57% 46% spectral-norm source secs mem gz busy cpu load Go 1.43 2,208 548 5.68 99% 99% 100% 99% Java 1.58 39,408 756 5.97 94% 94% 96% 94% mandelbrot source secs mem gz busy cpu load Go 3.73 34,192 905 14.85 99% 99% 99% 100% Java 4.12 70,952 796 16.22 98% 98% 98% 99% n-body source secs mem gz busy cpu load Go 6.38 1,604 1200 6.42 0% 100% 0% 0% Java 6.77 35,432 1489 6.82 100% 1% 0% 0% fasta source secs mem gz busy cpu load Go 1.26 11,480 1404 3.89 79% 89% 70% 71% Java 1.19 44,740 2543 3.50 75% 63% 87% 70% pidigits source secs mem gz busy cpu load Go 1.00 8,808 683 1.03 2% 1% 45% 55% Java 0.93 36,088 764 0.97 4% 0% 1% 99% k-nucleotide source secs mem gz busy cpu load Go 7.46 160,328 1607 28.71 98% 95% 95% 97% Java 4.85 354,288 1812 15.92 80% 85% 87% 76% binary-trees source secs mem gz busy cpu load Go 12.23 392,744 1017 41.62 83% 87% 85% 85% Java 2.48 1,725,776 835 7.86 74% 75% 97% 72% Go go version go1.17 linux/amd64 Java openjdk 17 2021-09-14 OpenJDK Runtime Environment (build 17+35-2724) OpenJDK 64-Bit Server VM (build 17+35-2724, mixed mode, sharing) all Go programs & measurements all Java programs & measurements