Programming Language and compiler
Benchmarks

Wasm VS Python benchmarks

Current benchmark data was generated on Mon Jun 23 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
python 1.py 1191ms 15ms 96.3MB 1123ms 53ms pypy 3.10.16
wasm 5.rs 1914ms 16ms 35.7MB 1893ms 10ms wasmtime 34.0.0
wasm 4.rs 1932ms 53ms 33.7MB 1910ms 10ms wasmtime 34.0.0
wasm 3.rs 1979ms 111ms 50.0MB 1950ms 20ms wasmtime 34.0.0
python 1.py timeout 0.0ms 41.0MB 4973ms 17ms cpython 3.13.5
python 1.py timeout 0.0ms 40.5MB 4750ms 230ms pyston 3.8.12

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 101ms 1.2ms 68.6MB 67ms 20ms pypy 3.10.16
wasm 5.rs 172ms 1.4ms 19.8MB 157ms 0ms wasmtime 34.0.0
wasm 4.rs 174ms 2.0ms 19.8MB 163ms 0ms wasmtime 34.0.0
wasm 3.rs 181ms 4.1ms 21.7MB 163ms 0ms wasmtime 34.0.0
python 1.py 476ms 3.1ms 11.9MB 453ms 10ms pyston 3.8.12
python 1.py 734ms 12ms 13.0MB 723ms 0ms cpython 3.13.5

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1130ms 4.9ms 20.1MB 1113ms 7ms wasmtime 34.0.0
python 1.py 1226ms 4.7ms 105.6MB 1180ms 37ms pypy 3.10.16
python 1.py 2700ms 31ms 25.4MB 2673ms 10ms cpython 3.13.5
python 1.py timeout 0.0ms 17.4MB 4980ms 3ms pyston 3.8.12

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 80ms 1.0ms 18.6MB 70ms 0ms wasmtime 34.0.0
python 1.py 226ms 2.3ms 84.8MB 190ms 23ms pypy 3.10.16
python 1.py 234ms 4.1ms 20.6MB 213ms 7ms cpython 3.13.5
python 1.py 649ms 4.8ms 16.8MB 630ms 3ms pyston 3.8.12

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 254ms 3.5ms 83.4MB 217ms 20ms pypy 3.10.16
python 1.py 362ms 1.9ms 12.6MB 343ms 3ms cpython 3.13.5
wasm 1.rs 418ms 0.4ms 19.3MB 403ms 0ms wasmtime 34.0.0
python 1.py 2004ms 4.0ms 9.6MB 1990ms 0ms pyston 3.8.12

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 102ms 1.5ms 63.6MB 77ms 10ms pypy 3.10.16
python 1.py 112ms 2.1ms 12.3MB 100ms 0ms cpython 3.13.5
wasm 1.rs 116ms 0.9ms 18.8MB 103ms 0ms wasmtime 34.0.0
python 1.py 352ms 1.3ms 8.8MB 340ms 0ms pyston 3.8.12

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 4068ms 6.6ms 17.6MB 4053ms 0ms wasmtime 34.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 348ms 3.7ms 17.6MB 337ms 0ms wasmtime 34.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 234ms 1.9ms 19.6MB 220ms 0ms wasmtime 34.0.0
python 1.py 1867ms 5.3ms 88.9MB 1820ms 33ms pypy 3.10.16
python 5-m.py 2287ms 10ms 65.6MB 3470ms 880ms pypy 3.10.16
python 5-m.py 2582ms 230ms 12.5MB 3513ms 1153ms pyston 3.8.12
python 1.py 3033ms 32ms 8.1MB 3020ms 0ms pyston 3.8.12
python 5-m.py 3368ms 22ms 13.9MB 4457ms 910ms cpython 3.13.5
python 1.py 4740ms 91ms 9.0MB 4727ms 0ms cpython 3.13.5

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 32ms 0.8ms 17.7MB 20ms 0ms wasmtime 34.0.0
python 1.py 255ms 1.5ms 63.4MB 223ms 17ms pypy 3.10.16
python 5-m.py 310ms 1.8ms 12.5MB 400ms 140ms pyston 3.8.12
python 1.py 314ms 0.6ms 8.1MB 300ms 0ms pyston 3.8.12
python 5-m.py 402ms 9.2ms 13.9MB 490ms 130ms cpython 3.13.5
python 5-m.py 450ms 6.4ms 65.6MB 747ms 310ms pypy 3.10.16
python 1.py 494ms 21ms 8.9MB 483ms 0ms cpython 3.13.5

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 7.1ms 0.1ms 16.7MB 0ms 0ms wasmtime 34.0.0
python 1.py 11ms 0.5ms 7.6MB 0ms 0ms pyston 3.8.12
python 1.py 14ms 1.1ms 8.9MB 0ms 0ms cpython 3.13.5
python 1.py 29ms 1.3ms 51.7MB 10ms 10ms pypy 3.10.16

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 93ms 2.2ms 18.2MB 80ms 0ms wasmtime 34.0.0
python 2.py 148ms 3.7ms 58.4MB 123ms 10ms pypy 3.10.16
python 1.py 182ms 4.5ms 59.4MB 160ms 10ms pypy 3.10.16
python 1.py 742ms 13ms 8.9MB 730ms 0ms pyston 3.8.12
python 2.py 861ms 17ms 8.5MB 850ms 0ms pyston 3.8.12
python 1.py 1135ms 8.0ms 9.5MB 1120ms 0ms cpython 3.13.5
python 2.py 1359ms 9.5ms 9.4MB 1347ms 0ms cpython 3.13.5

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 255ms 1.5ms 17.7MB 240ms 0ms wasmtime 34.0.0
python 2.py 340ms 3.5ms 59.4MB 317ms 10ms pypy 3.10.16
python 1.py 378ms 4.8ms 60.3MB 353ms 13ms pypy 3.10.16
python 1.py 2158ms 21ms 8.9MB 2147ms 0ms pyston 3.8.12
python 2.py 2527ms 78ms 8.5MB 2513ms 0ms pyston 3.8.12
python 1.py 3383ms 12ms 9.5MB 3370ms 0ms cpython 3.13.5
python 2.py 3989ms 100ms 9.3MB 3973ms 0ms cpython 3.13.5

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 48ms 0.7ms 17.9MB 40ms 0ms wasmtime 34.0.0
python 2.py 107ms 0.7ms 58.2MB 80ms 13ms pypy 3.10.16
python 1.py 121ms 2.3ms 58.8MB 100ms 10ms pypy 3.10.16
python 1.py 356ms 7.7ms 8.5MB 343ms 0ms pyston 3.8.12
python 2.py 388ms 3.7ms 8.1MB 377ms 0ms pyston 3.8.12
python 1.py 542ms 5.2ms 9.4MB 530ms 0ms cpython 3.13.5
python 2.py 648ms 0.8ms 8.9MB 637ms 0ms cpython 3.13.5

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 832ms 1.4ms 21.1MB 820ms 0ms wasmtime 34.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 44ms 1.0ms 18.2MB 30ms 0ms wasmtime 34.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 903ms 21ms 41.8MB 877ms 10ms wasmtime 34.0.0
python 1.py 2233ms 15ms 202.7MB 2127ms 97ms pypy 3.10.16
python 1.py timeout 0.0ms 94.1MB 4957ms 33ms cpython 3.13.5
python 1.py timeout 0.0ms 130.4MB 4937ms 50ms pyston 3.8.12

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 196ms 4.9ms 23.8MB 180ms 0ms wasmtime 34.0.0
python 1.py 385ms 7.0ms 104.8MB 327ms 43ms pypy 3.10.16
python 1.py 3165ms 60ms 37.3MB 3140ms 13ms cpython 3.13.5
python 1.py timeout 0.0ms 48.9MB 4963ms 23ms pyston 3.8.12

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 404ms 1.2ms 17.7MB 390ms 0ms wasmtime 34.0.0
wasm 2.rs 562ms 1.1ms 17.8MB 550ms 0ms wasmtime 34.0.0
python 2.py 1361ms 5.0ms 57.9MB 1333ms 10ms pypy 3.10.16
python 1.py 2654ms 8.4ms 58.4MB 2627ms 10ms pypy 3.10.16
python 1.py timeout 0.0ms 9.0MB 4990ms 0ms cpython 3.13.5
python 2.py timeout 0.0ms 9.0MB 4990ms 0ms cpython 3.13.5
python 1.py timeout 0.0ms 8.3MB 4990ms 0ms pyston 3.8.12
python 2.py timeout 0.0ms 8.1MB 4990ms 0ms pyston 3.8.12

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 49ms 0.5ms 17.9MB 37ms 0ms wasmtime 34.0.0
wasm 2.rs 66ms 1.6ms 18.0MB 50ms 0ms wasmtime 34.0.0
python 2.py 180ms 2.2ms 58.2MB 157ms 10ms pypy 3.10.16
python 1.py 306ms 6.8ms 57.2MB 283ms 10ms pypy 3.10.16
python 1.py 943ms 6.5ms 8.3MB 933ms 0ms pyston 3.8.12
python 2.py 1324ms 11ms 8.1MB 1313ms 0ms pyston 3.8.12
python 1.py 2929ms 30ms 9.0MB 2917ms 0ms cpython 3.13.5
python 2.py 2959ms 13ms 9.0MB 2947ms 0ms cpython 3.13.5

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 381ms 1.9ms 22.9MB 367ms 0ms wasmtime 34.0.0
wasm 1.rs 613ms 42ms 56.9MB 597ms 10ms wasmtime 34.0.0
python 1.py 2598ms 50ms 369.6MB 2527ms 57ms pypy 3.10.16
python 2.py 3047ms 54ms 632.9MB 2860ms 173ms pyston 3.8.12
python 1.py 4792ms 40ms 320.4MB 4733ms 43ms pyston 3.8.12
python 1.py timeout 0.0ms 321.4MB 4960ms 20ms cpython 3.13.5
python 2.py timeout 0.0ms 633.8MB 4817ms 173ms cpython 3.13.5
python 2.py timeout 0.0ms 960.0MB 4707ms 283ms pypy 3.10.16

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 95ms 0.7ms 27.6MB 80ms 0ms wasmtime 34.0.0
wasm 2.rs 98ms 1.0ms 20.9MB 87ms 0ms wasmtime 34.0.0
python 1.py 555ms 7.1ms 135.3MB 520ms 20ms pypy 3.10.16
python 2.py 736ms 10.0ms 164.3MB 693ms 30ms pyston 3.8.12
python 1.py 1099ms 37ms 86.0MB 1077ms 10ms pyston 3.8.12
python 2.py 1419ms 19ms 165.1MB 1373ms 33ms cpython 3.13.5
python 2.py 1579ms 52ms 290.2MB 1487ms 77ms pypy 3.10.16
python 1.py 2896ms 26ms 87.0MB 2870ms 10ms cpython 3.13.5

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 4.py 1919ms 1.6ms 8.9MB 1877ms 27ms pyston 3.8.12
python 4.py 1963ms 11ms 9.5MB 1907ms 40ms cpython 3.13.5
python 4.py 2195ms 8.6ms 89.5MB 2153ms 27ms pypy 3.10.16
wasm 2.rs 2220ms 15ms 18.7MB 2203ms 0ms wasmtime 34.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 4.py 451ms 1.8ms 8.6MB 440ms 0ms pyston 3.8.12
python 4.py 466ms 1.8ms 9.4MB 453ms 0ms cpython 3.13.5
wasm 2.rs 523ms 2.7ms 18.4MB 510ms 0ms wasmtime 34.0.0
python 4.py 552ms 2.6ms 83.9MB 513ms 27ms pypy 3.10.16

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 3187ms 17ms 8.3MB 3173ms 0ms pyston 3.8.12
python 1.py 3532ms 13ms 74.6MB 3497ms 20ms pypy 3.10.16
wasm 1.rs 3588ms 10ms 17.7MB 3573ms 0ms wasmtime 34.0.0
python 1.py 3783ms 19ms 8.9MB 3770ms 0ms cpython 3.13.5

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 804ms 5.9ms 8.3MB 793ms 0ms pyston 3.8.12
wasm 1.rs 900ms 5.2ms 18.0MB 887ms 0ms wasmtime 34.0.0
python 1.py 957ms 5.7ms 8.9MB 943ms 0ms cpython 3.13.5
python 1.py 990ms 6.3ms 67.4MB 960ms 17ms pypy 3.10.16

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3609ms 13ms 17.7MB 3590ms 0ms wasmtime 34.0.0
wasm 7.rs 4900ms 13ms 17.7MB 4887ms 0ms wasmtime 34.0.0
python 8.py timeout 0.0ms 14.8MB 40ms 10ms cpython 3.13.5
python 8.py timeout 0.0ms 95.4MB 777ms 80ms pypy 3.10.16
python 8.py timeout 0.0ms 14.2MB 37ms 10ms pyston 3.8.12

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 908ms 2.9ms 19.5MB 893ms 0ms wasmtime 34.0.0
wasm 7.rs 1231ms 2.5ms 18.1MB 1220ms 0ms wasmtime 34.0.0
python 8.py timeout 0.0ms 14.5MB 47ms 10ms cpython 3.13.5
python 8.py timeout 0.0ms 95.8MB 1297ms 173ms pypy 3.10.16
python 8.py timeout 0.0ms 13.7MB 60ms 20ms pyston 3.8.12

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 234ms 0.4ms 17.8MB 220ms 0ms wasmtime 34.0.0
wasm 7.rs 316ms 2.7ms 17.4MB 300ms 0ms wasmtime 34.0.0
python 8-m.py 1962ms 22ms 93.3MB 6350ms 247ms pypy 3.10.16
python 8.py timeout 0.0ms 14.0MB 83ms 20ms cpython 3.13.5
python 8.py timeout 0.0ms 13.1MB 137ms 33ms pyston 3.8.12