Programming Language and compiler
Benchmarks

Swift VS Java benchmarks

Current benchmark data was generated on Mon Apr 14 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 461ms 12ms 574.0MB 563ms 83ms openjdk 21
java 2.java 480ms 4.7ms 624.4MB 600ms 97ms openjdk 23
java 2-m.java 481ms 6.8ms 642.9MB 670ms 120ms graal/jvm 17.0.8
java 2.java 1174ms 6.5ms 1067.3MB 593ms 750ms openjdk/zgc 21
swift 1.swift 2675ms 16ms 53.8MB 2643ms 20ms swift 6.1.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 125ms 2.4ms 165.6MB 157ms 30ms openjdk 21
java 2.java 135ms 5.3ms 96.2MB 173ms 27ms openjdk 23
java 2-m.java 150ms 5.9ms 224.4MB 227ms 53ms graal/jvm 17.0.8
swift 1.swift 239ms 3.9ms 11.8MB 227ms 0ms swift 6.1.0
java 2.java 304ms 2.2ms 241.6MB 157ms 203ms 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 911ms 6.0ms 96.1MB 3347ms 33ms graal/jvm 17.0.8
java 1-m.java 953ms 33ms 48.3MB 3547ms 20ms openjdk 21
java 1-m.java 980ms 19ms 51.0MB 3597ms 23ms openjdk 23
java 1-m.java 1046ms 9.7ms 45.8MB 3413ms 143ms openjdk/zgc 21
swift 1.swift 2491ms 11ms 5.5MB 2480ms 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 184ms 2.3ms 48.2MB 500ms 20ms openjdk 21
java 1-m.java 197ms 4.9ms 96.2MB 543ms 40ms graal/jvm 17.0.8
java 1-m.java 199ms 6.2ms 50.0MB 510ms 23ms openjdk 23
swift 1.swift 213ms 3.7ms 6.3MB 203ms 0ms swift 6.1.0
java 1-m.java 312ms 5.2ms 45.8MB 507ms 143ms openjdk/zgc 21

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 146ms 0.8ms 20.8MB 433ms 0ms swift 6.1.0
java 4.java 446ms 6.7ms 102.7MB 630ms 37ms graal/jvm 17.0.8
java 4.java 453ms 2.9ms 47.7MB 537ms 17ms openjdk 21
java 4.java 462ms 5.5ms 49.0MB 553ms 20ms openjdk 23
java 4.java 574ms 8.7ms 45.3MB 550ms 140ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3.swift 38ms 0.4ms 18.2MB 37ms 0ms swift 6.1.0
java 4.java 125ms 2.4ms 46.7MB 167ms 20ms openjdk 21
java 4.java 134ms 2.5ms 47.9MB 180ms 20ms openjdk 23
java 4-m.java 134ms 4.6ms 91.8MB 193ms 37ms graal/jvm 17.0.8
java 4.java 250ms 3.6ms 43.9MB 170ms 137ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2.3ms 0.2ms 5.8MB 0ms 0ms swift 6.1.0
java 1.java 63ms 1.5ms 52.7MB 70ms 20ms graal/jvm 17.0.8
java 1.java 72ms 3.3ms 44.4MB 74ms 20ms openjdk 23
java 1.java 73ms 1.7ms 43.8MB 80ms 14ms openjdk 21
java 1.java 193ms 6.2ms 43.0MB 84ms 140ms 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 1010ms 47ms 129.8MB 3437ms 37ms openjdk 21
java 3-m.java 1095ms 25ms 156.9MB 3717ms 67ms openjdk 23
java 3-m.java 1123ms 19ms 177.6MB 3827ms 70ms graal/jvm 17.0.8
swift 2-m.swift 1336ms 17ms 70.7MB 4880ms 30ms swift 6.1.0
java 3-m.java 1402ms 51ms 179.1MB 4423ms 200ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 2-m.swift 248ms 2.1ms 60.0MB 663ms 23ms swift 6.1.0
java 3-m.java 346ms 19ms 139.5MB 977ms 53ms graal/jvm 17.0.8
java 3-m.java 346ms 13ms 101.8MB 1000ms 40ms openjdk 21
java 3-m.java 346ms 17ms 89.2MB 1033ms 43ms openjdk 23
java 3-m.java 436ms 1.7ms 98.6MB 903ms 170ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 344ms 2.0ms 10.0MB 330ms 0ms swift 6.1.0
java 1.java 449ms 6.5ms 81.4MB 477ms 30ms graal/jvm 17.0.8
java 1.java 451ms 0.4ms 48.3MB 487ms 17ms openjdk 23
java 1.java 457ms 15ms 45.3MB 490ms 17ms openjdk 21
java 1.java 571ms 1.4ms 44.9MB 493ms 137ms openjdk/zgc 21
java 2.java 1260ms 11ms 640.1MB 1390ms 87ms openjdk 21
java 2.java 1275ms 9.1ms 826.3MB 1380ms 123ms openjdk 23
java 2.java 3279ms 125ms 2446.0MB 1647ms 1853ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 39ms 0.2ms 10.0MB 30ms 0ms swift 6.1.0
java 1.java 118ms 2.8ms 81.5MB 143ms 30ms graal/jvm 17.0.8
java 1.java 123ms 2.0ms 45.2MB 163ms 20ms openjdk 21
java 1.java 124ms 4.2ms 48.2MB 157ms 20ms openjdk 23
java 1.java 251ms 4.1ms 44.9MB 173ms 140ms openjdk/zgc 21
java 2-m.java 305ms 5.3ms 394.5MB 447ms 60ms openjdk 21
java 2-m.java 328ms 5.1ms 392.1MB 470ms 70ms openjdk 23
java 2.java 687ms 2.7ms 524.4MB 477ms 407ms openjdk/zgc 21

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3224ms 1.3ms 443.5MB 3647ms 100ms graal/jvm 17.0.8
java 1.java 3724ms 86ms 425.6MB 4620ms 100ms openjdk 21
java 1.java 3773ms 21ms 441.7MB 4677ms 123ms openjdk 23
java 1.java timeout 0.0ms 1810.6MB 4800ms 1133ms openjdk/zgc 21
swift 1.swift timeout 0.0ms 7.1MB 4937ms 50ms swift 6.1.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 896ms 7.7ms 441.5MB 1250ms 83ms graal/jvm 17.0.8
java 1-m.java 1025ms 8.5ms 437.3MB 1870ms 107ms openjdk 23
java 1-m.java 1037ms 25ms 375.5MB 1830ms 100ms openjdk 21
swift 1.swift 1928ms 4.2ms 7.0MB 1913ms 0ms swift 6.1.0
java 1.java 2051ms 1.9ms 1354.1MB 1723ms 1100ms openjdk/zgc 21