Programming Language and compiler
Benchmarks

Wasm VS Crystal benchmarks

Current benchmark data was generated on Tue Apr 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
crystal 1.cr 1295ms 34ms 64.0MB 1273ms 10ms crystal 1.15.1
wasm 5.rs 1809ms 60ms 33.1MB 1790ms 7ms wasmtime 31.0.0
wasm 3.rs 1854ms 16ms 49.2MB 1827ms 17ms wasmtime 31.0.0
wasm 4.rs 1863ms 11ms 33.2MB 1840ms 10ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 107ms 2.5ms 10.9MB 93ms 0ms crystal 1.15.1
wasm 5.rs 174ms 4.1ms 19.3MB 157ms 0ms wasmtime 31.0.0
wasm 3.rs 180ms 2.4ms 21.1MB 163ms 0ms wasmtime 31.0.0
wasm 4.rs 181ms 4.0ms 19.2MB 163ms 0ms wasmtime 31.0.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1133ms 6.8ms 19.4MB 1117ms 0ms wasmtime 31.0.0
crystal 1.cr 1270ms 70ms 19.6MB 1200ms 53ms crystal 1.15.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 72ms 1.4ms 7.0MB 50ms 10ms crystal 1.15.1
wasm 3.rs 82ms 1.6ms 17.7MB 70ms 0ms wasmtime 31.0.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 60ms 1.5ms 6.5MB 43ms 3ms crystal 1.15.1
wasm 1.rs 421ms 7.8ms 18.6MB 403ms 3ms wasmtime 31.0.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 22ms 0.5ms 5.0MB 10ms 0ms crystal 1.15.1
wasm 1.rs 115ms 2.6ms 18.0MB 103ms 0ms wasmtime 31.0.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2504ms 1.5ms 2.8MB 2497ms 0ms crystal 1.15.1
wasm 1.rs 4154ms 12ms 16.7MB 4137ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 207ms 1.1ms 2.8MB 200ms 0ms crystal 1.15.1
wasm 1.rs 353ms 4.0ms 17.2MB 340ms 0ms wasmtime 31.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 237ms 2.6ms 17.5MB 223ms 3ms wasmtime 31.0.0
crystal 2.cr 556ms 1.6ms 3.4MB 453ms 90ms crystal 1.15.1
crystal 1.cr 697ms 1.0ms 14.4MB 580ms 103ms crystal 1.15.1

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 32ms 0.9ms 17.3MB 20ms 0ms wasmtime 31.0.0
crystal 2.cr 60ms 1.1ms 3.5MB 43ms 7ms crystal 1.15.1
crystal 1.cr 75ms 1.3ms 4.8MB 53ms 7ms crystal 1.15.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1.9ms 0.2ms 2.8MB 0ms 0ms crystal 1.15.1
wasm 1.rs 7.3ms 1.3ms 17.4MB 0ms 0ms wasmtime 31.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 36ms 1.5ms 2.9MB 30ms 0ms crystal 1.15.1
crystal 1.cr 65ms 1.9ms 2.9MB 57ms 0ms crystal 1.15.1
wasm 1.rs 90ms 0.5ms 17.4MB 80ms 0ms wasmtime 31.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 99ms 0.6ms 2.9MB 90ms 0ms crystal 1.15.1
crystal 1.cr 185ms 2.9ms 2.9MB 173ms 0ms crystal 1.15.1
wasm 1.rs 255ms 5.4ms 16.9MB 240ms 0ms wasmtime 31.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 18ms 0.5ms 2.9MB 10ms 0ms crystal 1.15.1
crystal 1.cr 31ms 1.5ms 2.9MB 20ms 0ms crystal 1.15.1
wasm 1.rs 48ms 1.5ms 17.4MB 37ms 0ms wasmtime 31.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 314ms 1.6ms 9.2MB 300ms 0ms crystal 1.15.1
wasm 8.rs 832ms 8.8ms 20.3MB 817ms 0ms wasmtime 31.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 18ms 0.2ms 6.4MB 10ms 0ms crystal 1.15.1
wasm 8.rs 43ms 1.1ms 17.4MB 30ms 0ms wasmtime 31.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 880ms 9.8ms 64.0MB 860ms 7ms crystal 1.15.1
wasm 1.rs 939ms 69ms 41.1MB 913ms 13ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 164ms 2.8ms 22.1MB 147ms 0ms crystal 1.15.1
wasm 1.rs 201ms 2.9ms 23.2MB 183ms 0ms wasmtime 31.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 345ms 1.0ms 3.3MB 337ms 0ms crystal 1.15.1
crystal 1.cr 346ms 1.2ms 3.3MB 333ms 0ms crystal 1.15.1
wasm 1.rs 413ms 2.3ms 17.1MB 400ms 0ms wasmtime 31.0.0
wasm 2.rs 587ms 3.1ms 17.0MB 573ms 0ms wasmtime 31.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 38ms 1.0ms 3.1MB 30ms 0ms crystal 1.15.1
crystal 1.cr 39ms 1.6ms 3.1MB 30ms 0ms crystal 1.15.1
wasm 1.rs 50ms 1.6ms 17.1MB 37ms 0ms wasmtime 31.0.0
wasm 2.rs 67ms 0.7ms 17.4MB 53ms 0ms wasmtime 31.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 305ms 5.0ms 8.1MB 293ms 0ms crystal 1.15.1
wasm 2.rs 376ms 5.1ms 22.0MB 360ms 0ms wasmtime 31.0.0
crystal 1.cr 425ms 1.3ms 42.3MB 410ms 0ms crystal 1.15.1
wasm 1.rs 510ms 12ms 56.1MB 493ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 77ms 1.5ms 4.4MB 67ms 0ms crystal 1.15.1
crystal 1.cr 91ms 3.5ms 13.0MB 83ms 0ms crystal 1.15.1
wasm 1.rs 99ms 4.3ms 27.0MB 83ms 0ms wasmtime 31.0.0
wasm 2.rs 100ms 2.4ms 18.4MB 83ms 7ms wasmtime 31.0.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1938ms 39ms 6.1MB 1910ms 13ms crystal 1.15.1
wasm 2.rs 2211ms 7.5ms 18.2MB 2197ms 0ms wasmtime 31.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 472ms 18ms 5.0MB 457ms 0ms crystal 1.15.1
wasm 2.rs 531ms 6.4ms 17.6MB 513ms 0ms wasmtime 31.0.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3610ms 3.0ms 16.9MB 3597ms 0ms wasmtime 31.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 910ms 1.5ms 16.8MB 897ms 0ms wasmtime 31.0.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3602ms 4.5ms 16.9MB 3587ms 0ms wasmtime 31.0.0
crystal 1.cr 3796ms 8.1ms 4.5MB 3787ms 0ms crystal 1.15.1
wasm 7.rs 4912ms 16ms 16.9MB 4897ms 0ms wasmtime 31.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 910ms 0.9ms 16.7MB 897ms 0ms wasmtime 31.0.0
crystal 1.cr 953ms 3.3ms 4.3MB 940ms 0ms crystal 1.15.1
wasm 7.rs 1240ms 9.5ms 16.9MB 1230ms 0ms wasmtime 31.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 235ms 1.1ms 17.2MB 220ms 0ms wasmtime 31.0.0
crystal 1.cr 242ms 2.7ms 3.8MB 230ms 0ms crystal 1.15.1
wasm 7.rs 321ms 11ms 16.8MB 307ms 0ms wasmtime 31.0.0