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 3.94 323,252 810 6.14 74% 30% 19% 33% Java 5.58 985,696 929 18.26 81% 77% 84% 85% fannkuch-redux source secs mem gz busy cpu load Go 7.59 2,064 969 30.31 100% 100% 100% 100% Java 10.64 35,192 1282 41.91 99% 98% 99% 97% spectral-norm source secs mem gz busy cpu load Go 1.44 2,356 548 5.71 99% 99% 99% 99% Java 1.63 39,304 756 6.22 95% 97% 95% 95% mandelbrot source secs mem gz busy cpu load Go 3.75 34,832 894 14.92 100% 99% 99% 100% Java 4.15 69,136 796 16.29 98% 99% 98% 99% reverse-complement source secs mem gz busy cpu load Go 1.42 1,344,600 1338 2.66 57% 36% 71% 24% Java 1.54 670,924 2183 3.51 46% 56% 48% 79% n-body source secs mem gz busy cpu load Go 6.38 1,896 1200 6.43 0% 100% 1% 0% Java 6.74 35,844 1489 6.82 1% 100% 1% 0% fasta source secs mem gz busy cpu load Go 1.28 11,276 1404 3.78 65% 86% 81% 65% Java 1.21 44,620 2543 3.58 89% 75% 65% 68% pidigits source secs mem gz busy cpu load Go 1.00 8,952 683 1.04 0% 3% 99% 2% Java 0.93 36,552 764 0.98 2% 3% 1% 99% k-nucleotide source secs mem gz busy cpu load Go 8.30 160,300 1607 31.96 96% 98% 96% 95% Java 4.98 356,904 1812 16.25 78% 76% 96% 76% binary-trees source secs mem gz busy cpu load Go 12.80 385,036 1017 43.87 85% 87% 85% 86% Java 2.48 1,722,848 835 7.88 98% 75% 71% 74% Go go version go1.16 linux/amd64 Java openjdk 16 2021-03-16 OpenJDK Runtime Environment (build 16+36-2231) OpenJDK 64-Bit Server VM (build 16+36-2231, mixed mode, sharing) all Go programs & measurements all Java programs & measurements