Programming Language and compiler
Benchmarks

Wasm VS Java benchmarks

Current benchmark data was generated on Fri Aug 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 460ms 9.2ms 574.1MB 553ms 83ms openjdk 21
java 2.java 470ms 8.8ms 624.4MB 577ms 97ms openjdk 23
java 2-m.java 480ms 9.9ms 640.7MB 680ms 110ms graal/jvm 17.0.8
java 2.java 1176ms 13ms 1047.1MB 593ms 757ms openjdk/zgc 21
wasm 5.rs 1754ms 5.6ms 33.8MB 1733ms 10ms wasmtime 35.0.0
wasm 3.rs 1818ms 28ms 49.8MB 1783ms 20ms wasmtime 35.0.0
wasm 4.rs 1833ms 6.3ms 33.7MB 1813ms 7ms wasmtime 35.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 120ms 4.9ms 168.1MB 150ms 30ms openjdk 21
java 2-m.java 123ms 0.5ms 97.0MB 173ms 23ms openjdk 23
java 2-m.java 144ms 3.8ms 224.3MB 210ms 57ms graal/jvm 17.0.8
wasm 5.rs 171ms 2.9ms 19.8MB 160ms 0ms wasmtime 35.0.0
wasm 4.rs 174ms 0.5ms 19.8MB 160ms 0ms wasmtime 35.0.0
wasm 3.rs 181ms 14ms 21.8MB 167ms 0ms wasmtime 35.0.0
java 2.java 304ms 3.3ms 241.5MB 163ms 190ms openjdk/zgc 21

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1118ms 22ms 20.1MB 1100ms 0ms wasmtime 35.0.0
java 1-m.java 2236ms 124ms 258.1MB 8487ms 130ms openjdk 21
java 1-m.java 2303ms 130ms 243.3MB 8747ms 120ms openjdk 23
java 1-m.java 2997ms 156ms 1243.2MB 9807ms 1063ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 81ms 2.8ms 20.2MB 70ms 0ms wasmtime 35.0.0
java 1-m.java 471ms 21ms 93.0MB 1567ms 57ms openjdk 23
java 1-m.java 471ms 2.6ms 127.2MB 1580ms 67ms openjdk 21
java 1-m.java 673ms 14ms 221.9MB 1820ms 257ms openjdk/zgc 21

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 416ms 5.6ms 19.5MB 403ms 0ms wasmtime 35.0.0
java 1-m.java 602ms 6.6ms 411.7MB 1153ms 120ms graal/jvm 17.0.8
java 1-m.java 633ms 49ms 246.2MB 1660ms 67ms openjdk 23
java 1-m.java 649ms 44ms 264.8MB 1710ms 73ms openjdk 21
java 1-m.java 984ms 28ms 530.2MB 1703ms 417ms openjdk/zgc 21

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 112ms 2.4ms 18.7MB 100ms 0ms wasmtime 35.0.0
java 1-m.java 306ms 11ms 225.9MB 603ms 67ms graal/jvm 17.0.8
java 1-m.java 335ms 14ms 179.8MB 920ms 50ms openjdk 21
java 1-m.java 367ms 12ms 110.6MB 1010ms 40ms openjdk 23
java 1-m.java 491ms 3.2ms 216.5MB 947ms 217ms 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 901ms 5.9ms 96.3MB 3333ms 40ms graal/jvm 17.0.8
java 1-m.java 977ms 10ms 48.5MB 3650ms 23ms openjdk 21
java 1-m.java 989ms 7.9ms 50.1MB 3647ms 20ms openjdk 23
java 1-m.java 1042ms 4.8ms 45.7MB 3417ms 137ms openjdk/zgc 21
wasm 1.rs 4146ms 2.1ms 17.3MB 4133ms 0ms wasmtime 35.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 188ms 18ms 48.6MB 537ms 20ms openjdk 21
java 1-m.java 195ms 1.4ms 50.2MB 520ms 20ms openjdk 23
java 1-m.java 202ms 10ms 96.3MB 560ms 40ms graal/jvm 17.0.8
java 1-m.java 309ms 8.1ms 46.1MB 513ms 137ms openjdk/zgc 21
wasm 1.rs 348ms 0.1ms 17.4MB 340ms 0ms wasmtime 35.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 220ms 0.6ms 18.0MB 210ms 0ms wasmtime 35.0.0
java 4.java 444ms 5.1ms 102.5MB 623ms 37ms graal/jvm 17.0.8
java 4.java 449ms 3.8ms 47.3MB 530ms 17ms openjdk 21
java 4.java 459ms 2.0ms 49.0MB 543ms 23ms openjdk 23
java 4.java 565ms 3.7ms 45.2MB 533ms 137ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 30ms 0.9ms 18.1MB 20ms 0ms wasmtime 35.0.0
java 4.java 118ms 6.7ms 46.6MB 160ms 17ms openjdk 21
java 4-m.java 125ms 7.8ms 89.8MB 170ms 30ms graal/jvm 17.0.8
java 4.java 125ms 0.3ms 47.7MB 167ms 17ms openjdk 23
java 4.java 239ms 8.3ms 44.0MB 157ms 137ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 6.4ms 0.3ms 18.0MB 0ms 0ms wasmtime 35.0.0
java 1.java 62ms 1.4ms 52.9MB 64ms 20ms graal/jvm 17.0.8
java 1.java 69ms 4.7ms 43.9MB 78ms 10ms openjdk 21
java 1.java 73ms 1.9ms 44.7MB 74ms 16ms openjdk 23
java 1.java 186ms 3.9ms 42.9MB 82ms 132ms openjdk/zgc 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 93ms 1.9ms 17.6MB 80ms 0ms wasmtime 35.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 255ms 0.8ms 18.2MB 240ms 0ms wasmtime 35.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 47ms 0.2ms 18.2MB 40ms 0ms wasmtime 35.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 817ms 1.4ms 21.1MB 803ms 0ms wasmtime 35.0.0
java 1b.java 1153ms 11ms 54.1MB 1260ms 20ms openjdk 21
java 1b.java 1157ms 12ms 55.0MB 1263ms 20ms openjdk 23
java 1b.java 1183ms 11ms 109.5MB 1370ms 40ms graal/jvm 17.0.8
java 1.java 1245ms 4.3ms 136.3MB 1357ms 43ms graal/jvm 17.0.8
java 1b.java 1267ms 8.8ms 51.0MB 1250ms 140ms openjdk/zgc 21
java 1a.java 1654ms 2.8ms 54.3MB 1750ms 23ms openjdk 21
java 1a.java 1658ms 10ms 56.0MB 1753ms 20ms openjdk 23
java 1a.java 1687ms 1.2ms 102.5MB 1797ms 43ms graal/jvm 17.0.8
java 1.java 1702ms 12ms 202.6MB 1770ms 47ms openjdk 21
java 1.java 1706ms 3.4ms 317.9MB 1760ms 57ms openjdk 23
java 1a.java 1782ms 6.3ms 51.8MB 1760ms 140ms openjdk/zgc 21
java 1.java 2356ms 2.1ms 854.4MB 1810ms 653ms openjdk/zgc 21
java 2.java timeout 0.0ms 644.5MB 5340ms 123ms openjdk 21
java 2.java timeout 0.0ms 857.3MB 5283ms 127ms openjdk 23
java 2.java timeout 0.0ms 3246.1MB 3480ms 1897ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 42ms 1.1ms 18.1MB 30ms 0ms wasmtime 35.0.0
java 1b-m.java 184ms 13ms 49.7MB 297ms 20ms openjdk 21
java 1b-m.java 184ms 12ms 50.6MB 283ms 20ms openjdk 23
java 1a-m.java 191ms 2.5ms 52.5MB 290ms 23ms openjdk 23
java 1-m.java 191ms 1.9ms 81.8MB 263ms 33ms openjdk 21
java 1-m.java 193ms 4.0ms 87.2MB 270ms 30ms openjdk 23
java 1a-m.java 194ms 8.6ms 50.1MB 297ms 23ms openjdk 21
java 1-m.java 195ms 8.1ms 113.2MB 303ms 40ms graal/jvm 17.0.8
java 1a-m.java 208ms 3.1ms 98.6MB 310ms 37ms graal/jvm 17.0.8
java 1b-m.java 250ms 12ms 101.3MB 427ms 43ms graal/jvm 17.0.8
java 1b.java 308ms 5.9ms 47.9MB 297ms 137ms openjdk/zgc 21
java 1a.java 314ms 9.4ms 49.0MB 293ms 137ms openjdk/zgc 21
java 1.java 327ms 6.4ms 114.5MB 263ms 160ms openjdk/zgc 21
java 2-m.java 558ms 9.6ms 613.1MB 853ms 87ms openjdk 21
java 2-m.java 567ms 2.5ms 749.4MB 837ms 107ms openjdk 23
java 2.java 1582ms 6.0ms 1355.1MB 833ms 1047ms openjdk/zgc 21

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 397ms 3.2ms 536.3MB 483ms 97ms openjdk 23
java 1.java 416ms 5.0ms 677.5MB 473ms 100ms openjdk 21
java 1-m.java 424ms 8.3ms 643.7MB 600ms 123ms graal/jvm 17.0.8
wasm 1.rs 880ms 4.4ms 41.7MB 857ms 10ms wasmtime 35.0.0
java 1.java 1020ms 3.1ms 946.5MB 477ms 693ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 163ms 2.8ms 158.5MB 247ms 40ms openjdk 23
java 1-m.java 166ms 1.2ms 207.9MB 240ms 40ms openjdk 21
wasm 1.rs 192ms 0.3ms 24.1MB 180ms 0ms wasmtime 35.0.0
java 1-m.java 210ms 6.3ms 253.8MB 347ms 60ms graal/jvm 17.0.8
java 1.java 404ms 6.6ms 341.9MB 220ms 260ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 410ms 1.4ms 17.8MB 400ms 0ms wasmtime 35.0.0
java 1.java 442ms 1.6ms 81.4MB 473ms 23ms graal/jvm 17.0.8
java 1.java 445ms 1.9ms 47.7MB 480ms 17ms openjdk 23
java 1.java 446ms 15ms 45.2MB 487ms 13ms openjdk 21
wasm 2.rs 565ms 5.2ms 17.9MB 553ms 0ms wasmtime 35.0.0
java 1.java 567ms 4.2ms 44.9MB 490ms 140ms openjdk/zgc 21
java 2.java 1238ms 17ms 608.0MB 1377ms 77ms openjdk 21
java 2.java 1243ms 5.5ms 744.5MB 1360ms 97ms openjdk 23
java 2.java 3248ms 81ms 2438.6MB 1660ms 1800ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 48ms 0.9ms 17.8MB 40ms 0ms wasmtime 35.0.0
wasm 2.rs 65ms 1.2ms 17.8MB 50ms 0ms wasmtime 35.0.0
java 1.java 116ms 4.3ms 45.3MB 153ms 20ms openjdk 21
java 1.java 121ms 0.2ms 47.8MB 153ms 17ms openjdk 23
java 1-m.java 122ms 8.7ms 81.5MB 153ms 33ms graal/jvm 17.0.8
java 1.java 247ms 2.0ms 44.8MB 173ms 140ms openjdk/zgc 21
java 2-m.java 291ms 5.9ms 373.0MB 427ms 53ms openjdk 21
java 2-m.java 307ms 7.7ms 397.4MB 443ms 67ms openjdk 23
java 2.java 671ms 7.7ms 522.5MB 477ms 387ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 385ms 7.3ms 22.7MB 370ms 0ms wasmtime 35.0.0
java 1.java 387ms 7.8ms 118.0MB 423ms 27ms openjdk 23
java 1.java 394ms 5.7ms 115.1MB 443ms 27ms openjdk 21
wasm 1.rs 450ms 3.8ms 56.9MB 437ms 0ms wasmtime 35.0.0
java 1.java 562ms 3.9ms 112.6MB 470ms 167ms openjdk/zgc 21
java 1-m.java 600ms 11ms 206.8MB 877ms 60ms graal/jvm 17.0.8
java 2.java 775ms 5.6ms 57.1MB 827ms 23ms openjdk 21
java 2.java 783ms 4.2ms 60.4MB 833ms 17ms openjdk 23
java 2.java 839ms 5.9ms 53.4MB 773ms 137ms openjdk/zgc 21
java 2-m.java 1323ms 9.8ms 232.4MB 2367ms 107ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 92ms 1.1ms 27.5MB 80ms 0ms wasmtime 35.0.0
wasm 2.rs 99ms 0.8ms 19.1MB 90ms 0ms wasmtime 35.0.0
java 1.java 151ms 1.0ms 68.0MB 197ms 20ms openjdk 23
java 1.java 152ms 7.0ms 64.9MB 203ms 13ms openjdk 21
java 1-m.java 195ms 2.0ms 123.9MB 273ms 37ms graal/jvm 17.0.8
java 2.java 259ms 2.0ms 50.4MB 310ms 20ms openjdk 23
java 2.java 259ms 2.3ms 50.0MB 323ms 13ms openjdk 21
java 1.java 285ms 7.4ms 61.4MB 207ms 150ms openjdk/zgc 21
java 2.java 366ms 2.5ms 47.6MB 303ms 140ms openjdk/zgc 21
java 2-m.java 471ms 0.4ms 190.4MB 827ms 67ms graal/jvm 17.0.8

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2146ms 21ms 18.8MB 2133ms 0ms wasmtime 35.0.0
java 1.java 3168ms 8.2ms 444.5MB 3577ms 97ms graal/jvm 17.0.8
java 1.java 3667ms 34ms 351.6MB 4527ms 113ms openjdk 21
java 1.java 3722ms 53ms 381.7MB 4533ms 113ms openjdk 23
java 1.java timeout 0.0ms 1806.3MB 4663ms 1183ms openjdk/zgc 21

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 506ms 2.3ms 18.1MB 490ms 0ms wasmtime 35.0.0
java 1.java 882ms 6.0ms 444.1MB 1227ms 87ms graal/jvm 17.0.8
java 1-m.java 1009ms 31ms 430.6MB 1757ms 100ms openjdk 23
java 1-m.java 1016ms 30ms 351.1MB 1783ms 83ms openjdk 21
java 1.java 1974ms 2.9ms 1319.5MB 1730ms 1020ms openjdk/zgc 21

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3412ms 3.1ms 17.5MB 3400ms 0ms wasmtime 35.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 869ms 7.9ms 17.5MB 857ms 0ms wasmtime 35.0.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 1989ms 3.1ms 47.7MB 7617ms 27ms openjdk 21
java 2-m.java 1990ms 13ms 48.5MB 7613ms 23ms openjdk 23
java 2-m.java 2120ms 13ms 45.5MB 7643ms 150ms openjdk/zgc 21
java 2-m.java 2517ms 4.4ms 95.1MB 9440ms 40ms graal/jvm 17.0.8
wasm 7.rs 3602ms 3.8ms 18.1MB 3590ms 0ms wasmtime 35.0.0
wasm 2.rs 3607ms 9.5ms 17.8MB 3590ms 0ms wasmtime 35.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 605ms 4.4ms 47.8MB 2147ms 20ms openjdk 21
java 2-m.java 612ms 11ms 48.8MB 2177ms 23ms openjdk 23
java 2-m.java 724ms 6.4ms 45.4MB 2113ms 143ms openjdk/zgc 21
java 2-m.java 765ms 8.2ms 94.9MB 2697ms 33ms graal/jvm 17.0.8
wasm 2.rs 905ms 0.6ms 17.4MB 890ms 0ms wasmtime 35.0.0
wasm 7.rs 909ms 1.9ms 17.6MB 897ms 0ms wasmtime 35.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 7.rs 233ms 1.0ms 17.8MB 220ms 0ms wasmtime 35.0.0
wasm 2.rs 234ms 1.7ms 17.3MB 220ms 0ms wasmtime 35.0.0
java 2-m.java 252ms 7.4ms 47.9MB 763ms 17ms openjdk 21
java 2-m.java 258ms 6.1ms 48.6MB 780ms 17ms openjdk 23
java 2-m.java 303ms 24ms 93.3MB 927ms 37ms graal/jvm 17.0.8
java 2-m.java 376ms 7.1ms 45.5MB 770ms 140ms openjdk/zgc 21