Programming Language and compiler
Benchmarks

Wasm VS Crystal 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
crystal 1.cr 1235ms 5.9ms 64.2MB 1210ms 10ms crystal 1.16.2
wasm 5.rs 1774ms 4.7ms 33.7MB 1757ms 7ms wasmtime 32.0.0
wasm 3.rs 1818ms 20ms 49.7MB 1790ms 13ms wasmtime 32.0.0
wasm 4.rs 1821ms 4.3ms 33.8MB 1803ms 7ms wasmtime 32.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 107ms 1.5ms 11.0MB 93ms 0ms crystal 1.16.2
wasm 5.rs 170ms 2.0ms 19.7MB 160ms 0ms wasmtime 32.0.0
wasm 4.rs 177ms 2.1ms 19.7MB 163ms 0ms wasmtime 32.0.0
wasm 3.rs 180ms 5.3ms 21.7MB 163ms 0ms wasmtime 32.0.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1138ms 15ms 20.2MB 1123ms 0ms wasmtime 32.0.0
crystal 1.cr 1514ms 13ms 19.9MB 1450ms 53ms crystal 1.16.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 82ms 1.1ms 20.2MB 70ms 0ms wasmtime 32.0.0
crystal 1.cr 85ms 1.3ms 7.1MB 63ms 10ms crystal 1.16.2

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 57ms 0.6ms 6.4MB 40ms 0ms crystal 1.16.2
wasm 1.rs 421ms 3.5ms 19.4MB 407ms 0ms wasmtime 32.0.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 23ms 1.1ms 5.1MB 10ms 0ms crystal 1.16.2
wasm 1.rs 115ms 2.5ms 18.8MB 100ms 0ms wasmtime 32.0.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2480ms 8.8ms 2.9MB 2470ms 0ms crystal 1.16.2
wasm 1.rs 4121ms 1.0ms 17.3MB 4110ms 0ms wasmtime 32.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 206ms 3.4ms 2.9MB 197ms 0ms crystal 1.16.2
wasm 1.rs 345ms 2.7ms 17.3MB 333ms 0ms wasmtime 32.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 236ms 2.0ms 17.9MB 223ms 0ms wasmtime 32.0.0
crystal 2.cr 550ms 2.8ms 3.5MB 447ms 90ms crystal 1.16.2
crystal 1.cr 694ms 0.9ms 14.6MB 577ms 103ms crystal 1.16.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 31ms 1.2ms 17.8MB 20ms 0ms wasmtime 32.0.0
crystal 2.cr 58ms 0.8ms 3.6MB 40ms 3ms crystal 1.16.2
crystal 1.cr 75ms 0.4ms 4.9MB 50ms 10ms crystal 1.16.2

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1.9ms 0.1ms 2.9MB 0ms 0ms crystal 1.16.2
wasm 1.rs 6.4ms 0.3ms 16.1MB 0ms 0ms wasmtime 32.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 37ms 0.6ms 3.0MB 30ms 0ms crystal 1.16.2
crystal 1.cr 65ms 1.4ms 3.0MB 57ms 0ms crystal 1.16.2
wasm 1.rs 87ms 2.0ms 17.8MB 77ms 0ms wasmtime 32.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 99ms 0.9ms 3.0MB 90ms 0ms crystal 1.16.2
crystal 1.cr 187ms 2.0ms 3.0MB 180ms 0ms crystal 1.16.2
wasm 1.rs 246ms 2.8ms 17.5MB 233ms 0ms wasmtime 32.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 17ms 0.3ms 3.0MB 10ms 0ms crystal 1.16.2
crystal 1.cr 30ms 1.3ms 3.0MB 20ms 0ms crystal 1.16.2
wasm 1.rs 46ms 0.8ms 17.7MB 33ms 0ms wasmtime 32.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 314ms 1.1ms 9.3MB 300ms 0ms crystal 1.16.2
wasm 8.rs 822ms 2.9ms 20.8MB 807ms 0ms wasmtime 32.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 17ms 0.4ms 5.6MB 10ms 0ms crystal 1.16.2
wasm 8.rs 42ms 0.8ms 17.9MB 30ms 0ms wasmtime 32.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 846ms 6.4ms 64.2MB 823ms 10ms crystal 1.16.2
wasm 1.rs 885ms 0.7ms 43.7MB 860ms 10ms wasmtime 32.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 175ms 0.8ms 22.2MB 160ms 0ms crystal 1.16.2
wasm 1.rs 197ms 2.7ms 23.7MB 183ms 0ms wasmtime 32.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 343ms 0.7ms 3.3MB 330ms 0ms crystal 1.16.2
crystal 2.cr 344ms 2.9ms 3.3MB 333ms 0ms crystal 1.16.2
wasm 1.rs 404ms 2.4ms 17.8MB 393ms 0ms wasmtime 32.0.0
wasm 2.rs 563ms 3.0ms 17.9MB 550ms 0ms wasmtime 32.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 37ms 0.5ms 3.3MB 30ms 0ms crystal 1.16.2
crystal 1.cr 38ms 1.1ms 3.3MB 30ms 0ms crystal 1.16.2
wasm 1.rs 48ms 1.3ms 19.8MB 40ms 0ms wasmtime 32.0.0
wasm 2.rs 63ms 0.2ms 17.9MB 50ms 0ms wasmtime 32.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 348ms 4.1ms 8.3MB 340ms 0ms crystal 1.16.2
wasm 2.rs 367ms 10ms 22.7MB 353ms 0ms wasmtime 32.0.0
crystal 1.cr 427ms 4.1ms 43.0MB 413ms 0ms crystal 1.16.2
wasm 1.rs 458ms 4.0ms 56.9MB 443ms 0ms wasmtime 32.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 88ms 2.4ms 4.5MB 80ms 0ms crystal 1.16.2
crystal 1.cr 89ms 0.3ms 13.2MB 80ms 0ms crystal 1.16.2
wasm 1.rs 90ms 0.5ms 27.6MB 80ms 0ms wasmtime 32.0.0
wasm 2.rs 95ms 0.6ms 18.9MB 83ms 0ms wasmtime 32.0.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1973ms 67ms 6.3MB 1947ms 17ms crystal 1.16.2
wasm 2.rs 2190ms 4.4ms 19.1MB 2173ms 0ms wasmtime 32.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 457ms 15ms 5.1MB 443ms 0ms crystal 1.16.2
wasm 2.rs 519ms 3.4ms 18.1MB 507ms 0ms wasmtime 32.0.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3581ms 22ms 17.6MB 3567ms 0ms wasmtime 32.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 907ms 5.9ms 17.6MB 897ms 0ms wasmtime 32.0.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3694ms 3.7ms 17.6MB 3683ms 0ms wasmtime 32.0.0
crystal 1.cr 3764ms 9.2ms 4.6MB 3750ms 0ms crystal 1.16.2
wasm 7.rs 4898ms 2.5ms 18.1MB 4883ms 0ms wasmtime 32.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 934ms 2.7ms 17.7MB 920ms 0ms wasmtime 32.0.0
crystal 1.cr 950ms 8.9ms 4.4MB 940ms 0ms crystal 1.16.2
wasm 7.rs 1229ms 0.8ms 19.5MB 1217ms 0ms wasmtime 32.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 239ms 1.7ms 17.4MB 223ms 0ms wasmtime 32.0.0
crystal 1.cr 241ms 2.8ms 3.9MB 230ms 0ms crystal 1.16.2
wasm 7.rs 315ms 1.9ms 18.2MB 300ms 0ms wasmtime 32.0.0