Programming Language and compiler
Benchmarks

Swift VS Java benchmarks

Current benchmark data was generated on Thu May 01 2025, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] AMD EPYC 7763 64-Core Processor (Model 1)

* -m in a file name stands for multi-threading or multi-processing

* -i in a file name stands for direct intrinsics usage. (Usage of simd intrinsics via libraries is not counted)

* -ffi in a file name stands for non-stdlib FFI usage

* (You may find time < time(user) + time(sys) for some non-parallelized programs, the overhead is from GC or JIT compiler, which are allowed to take advantage of multi-cores as that's more close to real-world scenarios.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 458ms 2.1ms 574.1MB 557ms 83ms openjdk 21
java 2.java 472ms 4.2ms 620.6MB 573ms 107ms openjdk 23
java 2-m.java 478ms 13ms 644.0MB 667ms 127ms graal/jvm 17.0.8
java 2.java 1199ms 18ms 1054.6MB 590ms 770ms openjdk/zgc 21
swift 1.swift 2603ms 10ms 53.8MB 2570ms 20ms swift 6.1.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 124ms 1.9ms 98.4MB 163ms 30ms openjdk 23
java 2-m.java 127ms 2.5ms 167.1MB 160ms 30ms openjdk 21
java 2-m.java 144ms 4.4ms 215.0MB 210ms 60ms graal/jvm 17.0.8
swift 1.swift 236ms 1.2ms 11.8MB 220ms 0ms swift 6.1.0
java 2.java 305ms 0.9ms 241.8MB 150ms 207ms openjdk/zgc 21

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 899ms 16ms 96.0MB 3297ms 37ms graal/jvm 17.0.8
java 1-m.java 969ms 1.2ms 48.2MB 3613ms 23ms openjdk 21
java 1-m.java 975ms 13ms 50.4MB 3590ms 27ms openjdk 23
java 1-m.java 1033ms 1.0ms 45.9MB 3390ms 147ms openjdk/zgc 21
swift 1.swift 2477ms 9.7ms 5.5MB 2470ms 0ms swift 6.1.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 183ms 11ms 48.2MB 500ms 23ms openjdk 21
java 1-m.java 189ms 2.6ms 50.2MB 493ms 20ms openjdk 23
java 1-m.java 195ms 2.6ms 95.8MB 540ms 33ms graal/jvm 17.0.8
swift 1.swift 213ms 1.6ms 5.5MB 203ms 0ms swift 6.1.0
java 1-m.java 307ms 6.5ms 45.9MB 517ms 137ms openjdk/zgc 21

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 149ms 1.4ms 20.9MB 430ms 7ms swift 6.1.0
java 4.java 447ms 14ms 101.1MB 630ms 40ms graal/jvm 17.0.8
java 4.java 452ms 0.4ms 47.6MB 537ms 13ms openjdk 21
java 4.java 456ms 3.6ms 49.3MB 543ms 17ms openjdk 23
java 4.java 563ms 4.9ms 45.3MB 527ms 140ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3.swift 39ms 0.2ms 14.4MB 40ms 0ms swift 6.1.0
java 4-m.java 122ms 1.7ms 89.0MB 170ms 33ms graal/jvm 17.0.8
java 4.java 123ms 0.6ms 46.6MB 160ms 20ms openjdk 21
java 4-m.java 126ms 2.9ms 48.3MB 173ms 20ms openjdk 23
java 4.java 245ms 1.7ms 43.9MB 167ms 137ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2.4ms 0.3ms 5.8MB 0ms 0ms swift 6.1.0
java 1.java 62ms 1.3ms 52.7MB 66ms 18ms graal/jvm 17.0.8
java 1.java 71ms 1.1ms 43.7MB 74ms 12ms openjdk 21
java 1.java 72ms 2.0ms 44.7MB 76ms 14ms openjdk 23
java 1.java 189ms 5.2ms 42.9MB 80ms 136ms openjdk/zgc 21

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 3-m.java 1028ms 58ms 124.8MB 3470ms 40ms openjdk 21
java 3-m.java 1058ms 56ms 156.9MB 3590ms 60ms openjdk 23
java 3-m.java 1110ms 8.8ms 177.4MB 3807ms 67ms graal/jvm 17.0.8
swift 2-m.swift 1342ms 9.5ms 74.3MB 4893ms 33ms swift 6.1.0
java 3-m.java 1442ms 56ms 178.8MB 4513ms 213ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 2-m.swift 254ms 1.0ms 59.8MB 660ms 37ms swift 6.1.0
java 3-m.java 296ms 12ms 100.1MB 860ms 30ms openjdk 21
java 3-m.java 325ms 14ms 135.1MB 883ms 50ms graal/jvm 17.0.8
java 3-m.java 344ms 11ms 103.1MB 1013ms 43ms openjdk 23
java 3-m.java 434ms 8.6ms 98.4MB 900ms 167ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 345ms 0.9ms 10.0MB 337ms 0ms swift 6.1.0
java 1.java 440ms 3.0ms 45.1MB 477ms 20ms openjdk 21
java 1.java 444ms 1.1ms 48.2MB 480ms 20ms openjdk 23
java 1.java 447ms 4.2ms 81.5MB 483ms 27ms graal/jvm 17.0.8
java 1.java 570ms 5.4ms 44.7MB 497ms 133ms openjdk/zgc 21
java 2.java 1230ms 3.1ms 579.3MB 1353ms 83ms openjdk 21
java 2.java 1248ms 1.3ms 759.3MB 1357ms 110ms openjdk 23
java 2.java 3219ms 18ms 2343.5MB 1627ms 1803ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 38ms 0.6ms 10.1MB 30ms 0ms swift 6.1.0
java 1.java 119ms 2.0ms 45.2MB 157ms 20ms openjdk 21
java 1.java 120ms 1.7ms 48.4MB 157ms 20ms openjdk 23
java 1.java 125ms 4.1ms 81.6MB 153ms 33ms graal/jvm 17.0.8
java 1.java 243ms 3.0ms 44.8MB 167ms 140ms openjdk/zgc 21
java 2-m.java 286ms 3.4ms 356.7MB 417ms 53ms openjdk 21
java 2-m.java 310ms 7.8ms 413.9MB 440ms 70ms openjdk 23
java 2.java 684ms 9.8ms 530.4MB 453ms 420ms openjdk/zgc 21

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3228ms 11ms 443.7MB 3627ms 103ms graal/jvm 17.0.8
java 1.java 3700ms 73ms 442.1MB 4620ms 113ms openjdk 23
java 1.java 3741ms 9.8ms 385.9MB 4627ms 113ms openjdk 21
java 1.java timeout 0.0ms 1943.1MB 4667ms 1197ms openjdk/zgc 21
swift 1.swift timeout 0.0ms 7.1MB 4933ms 50ms swift 6.1.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 894ms 6.9ms 443.3MB 1253ms 90ms graal/jvm 17.0.8
java 1-m.java 987ms 25ms 365.4MB 1767ms 100ms openjdk 21
java 1-m.java 996ms 20ms 418.7MB 1797ms 107ms openjdk 23
swift 1.swift 1944ms 18ms 7.0MB 1930ms 0ms swift 6.1.0
java 1.java 1998ms 39ms 1350.6MB 1717ms 1037ms openjdk/zgc 21