Node js versus Java fastest programs Always look at the source code. These are only the fastest programs. Look at the other programs. They may seem more-like a fair comparison to you. regex-redux source secs mem gz busy cpu load Node js 9.53 756,856 668 12.74 71% 24% 13% 26% Java 10.27 635,500 740 29.42 74% 81% 55% 76% mandelbrot source secs mem gz busy cpu load Node js 6.84 88,016 1122 26.99 98% 98% 99% 98% Java 6.84 76,008 796 26.90 99% 98% 98% 98% spectral-norm source secs mem gz busy cpu load Node js 4.40 61,768 999 16.63 93% 97% 95% 93% Java 4.15 36,428 950 16.26 98% 100% 98% 97% n-body source secs mem gz busy cpu load Node js 26.28 35,412 1268 28.03 2% 0% 4% 100% Java 21.85 34,112 1489 22.16 1% 0% 0% 100% fannkuch-redux source secs mem gz busy cpu load Node js 19.48 58,152 1313 77.05 99% 99% 99% 99% Java 16.12 33,168 1282 63.71 100% 98% 99% 98% reverse-complement source secs mem gz busy cpu load Node js 4.10 1,340,368 1480 8.58 52% 56% 73% 28% Java 3.27 714,144 2183 7.54 47% 60% 66% 58% pidigits source secs mem gz busy cpu load Node js 2.58 36,368 599 2.97 100% 6% 7% 2% Java 1.83 34,848 764 1.95 99% 1% 4% 2% fasta source secs mem gz busy cpu load Node js 3.62 67,488 2047 10.61 72% 75% 72% 74% Java 2.22 43,096 2473 6.10 67% 83% 45% 80% binary-trees source secs mem gz busy cpu load Node js 19.22 1,000,628 711 61.94 80% 82% 82% 79% Java 8.28 948,040 835 28.20 80% 84% 87% 90% k-nucleotide source secs mem gz busy cpu load Node js 26.32 397,472 1812 77.28 74% 71% 62% 87% Java 9.14 403,576 1812 29.10 87% 72% 74% 86% Node js v14.2.0 Java openjdk 14 2020-03-17 OpenJDK Runtime Environment (build 14+36-1461) OpenJDK 64-Bit Server VM (build 14+36-1461, mixed mode, sharing) all Node js programs & measurements all Java programs & measurements