Programming Language and compiler
Benchmarks

Crystal VS Javascript benchmarks

Current benchmark data was generated on Sun Jul 13 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
javascript 1.js 1052ms 7.6ms 474.5MB 977ms 230ms node 24.4.0
javascript 1-m.js 1079ms 165ms 176.6MB 1527ms 260ms bun 1.2.18
crystal 1.cr 1241ms 14ms 64.2MB 1213ms 13ms crystal 1.16.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 98ms 1.3ms 77.8MB 77ms 27ms bun 1.2.18
crystal 1.cr 105ms 3.7ms 11.0MB 93ms 0ms crystal 1.16.3
javascript 1.js 128ms 1.6ms 81.3MB 130ms 20ms node 24.4.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1511ms 17ms 19.9MB 1450ms 47ms crystal 1.16.3
javascript 1.js 1600ms 6.3ms 189.8MB 1570ms 100ms node 24.4.0
javascript 1.js 2457ms 68ms 101.6MB 2500ms 63ms bun 1.2.18

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 86ms 1.4ms 7.1MB 63ms 13ms crystal 1.16.3
javascript 1.js 157ms 1.8ms 75.4MB 143ms 23ms node 24.4.0
javascript 1.js 216ms 4.5ms 88.7MB 250ms 33ms bun 1.2.18

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 59ms 1.2ms 7.6MB 40ms 3ms crystal 1.16.3
javascript 1.js 278ms 4.4ms 67.5MB 290ms 27ms node 24.4.0
javascript 1.js 518ms 1.5ms 75.6MB 490ms 23ms bun 1.2.18

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 23ms 0.9ms 5.3MB 10ms 0ms crystal 1.16.3
javascript 1.js 126ms 2.6ms 63.6MB 117ms 13ms node 24.4.0
javascript 1.js 511ms 2.2ms 65.1MB 483ms 20ms bun 1.2.18

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2476ms 14ms 2.9MB 2467ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 205ms 3.2ms 2.9MB 197ms 0ms crystal 1.16.3

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 534ms 3.4ms 3.6MB 443ms 73ms crystal 1.16.3
crystal 1.cr 676ms 1.2ms 14.6MB 570ms 93ms crystal 1.16.3

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 57ms 1.2ms 3.5MB 40ms 3ms crystal 1.16.3
crystal 1.cr 73ms 2.0ms 4.4MB 57ms 3ms crystal 1.16.3

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1.9ms 0.2ms 2.9MB 0ms 0ms crystal 1.16.3
javascript 1.js 12ms 0.4ms 31.6MB 0ms 0ms bun 1.2.18
javascript 1.js 31ms 0.6ms 50.8MB 16ms 6ms node 24.4.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1-m.bun.js 245ms 9.4ms 77.8MB 127ms 323ms bun 1.2.18
crystal 1.cr 1888ms 247ms 299.0MB 317ms 443ms crystal 1.16.3
javascript 1.js 2524ms 226ms 270.7MB 2467ms 1187ms node 24.4.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.bun.js 96ms 12ms 54.6MB 33ms 73ms bun 1.2.18
javascript 1.js 344ms 3.3ms 85.1MB 327ms 127ms node 24.4.0
crystal 1.cr 1291ms 23ms 53.0MB 33ms 70ms crystal 1.16.3

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 35ms 0.6ms 3.0MB 30ms 0ms crystal 1.16.3
crystal 1.cr 65ms 0.7ms 3.0MB 60ms 0ms crystal 1.16.3
javascript 2.js 308ms 3.4ms 64.9MB 300ms 10ms node 24.4.0
javascript 1.js 572ms 4.7ms 63.7MB 557ms 10ms node 24.4.0
javascript 2.js 688ms 11ms 123.5MB 753ms 57ms bun 1.2.18
javascript 1.js 822ms 6.8ms 106.5MB 900ms 87ms bun 1.2.18

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 101ms 1.8ms 3.0MB 90ms 0ms crystal 1.16.3
crystal 1.cr 186ms 0.4ms 3.0MB 180ms 0ms crystal 1.16.3
javascript 2.js 837ms 7.0ms 71.6MB 820ms 17ms node 24.4.0
javascript 1.js 1623ms 6.8ms 70.0MB 1603ms 13ms node 24.4.0
javascript 2.js 1931ms 13ms 123.3MB 2110ms 67ms bun 1.2.18
javascript 1.js 2398ms 29ms 111.6MB 2653ms 207ms bun 1.2.18

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 18ms 0.7ms 3.0MB 10ms 0ms crystal 1.16.3
crystal 1.cr 30ms 1.1ms 3.0MB 20ms 0ms crystal 1.16.3
javascript 2.js 163ms 0.9ms 59.3MB 157ms 10ms node 24.4.0
javascript 1.js 169ms 0.4ms 61.0MB 153ms 10ms node 24.4.0
javascript 1.js 317ms 1.9ms 130.9MB 350ms 73ms bun 1.2.18
javascript 2.js 372ms 1.1ms 125.8MB 400ms 50ms bun 1.2.18

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 316ms 2.0ms 9.3MB 303ms 0ms crystal 1.16.3

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 17ms 0.1ms 5.8MB 10ms 0ms crystal 1.16.3

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1-m.js 468ms 20ms 136.0MB 607ms 117ms bun 1.2.18
javascript 1.js 563ms 3.7ms 230.8MB 563ms 117ms node 24.4.0
crystal 1.cr 843ms 9.4ms 64.2MB 820ms 10ms crystal 1.16.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 117ms 2.5ms 85.9MB 103ms 30ms bun 1.2.18
javascript 1.js 157ms 1.0ms 100.4MB 153ms 33ms node 24.4.0
crystal 1.cr 178ms 3.9ms 22.2MB 163ms 0ms crystal 1.16.3

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 343ms 3.1ms 3.3MB 333ms 0ms crystal 1.16.3
crystal 1.cr 347ms 1.5ms 3.3MB 337ms 0ms crystal 1.16.3
javascript 6.js 455ms 2.0ms 58.8MB 447ms 3ms node 24.4.0
javascript 6.js 607ms 14ms 44.8MB 610ms 0ms bun 1.2.18

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 37ms 0.6ms 3.3MB 30ms 0ms crystal 1.16.3
crystal 2.cr 38ms 0.9ms 3.3MB 30ms 0ms crystal 1.16.3
javascript 6.js 79ms 3.2ms 58.9MB 67ms 10ms node 24.4.0
javascript 6.js 80ms 1.8ms 44.9MB 83ms 7ms bun 1.2.18

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 351ms 3.7ms 8.3MB 340ms 0ms crystal 1.16.3
crystal 1.cr 418ms 6.0ms 43.0MB 407ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 87ms 1.6ms 4.5MB 80ms 0ms crystal 1.16.3
crystal 1.cr 92ms 2.2ms 13.1MB 80ms 0ms crystal 1.16.3

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1967ms 53ms 6.3MB 1943ms 13ms crystal 1.16.3
javascript 3.js 4804ms 45ms 122.6MB 4760ms 47ms node 24.4.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 446ms 6.4ms 5.0MB 433ms 0ms crystal 1.16.3
javascript 3.js 1034ms 5.1ms 73.9MB 1010ms 17ms node 24.4.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 6-m.js 2178ms 17ms 118.9MB 8247ms 70ms node 24.4.0
crystal 1.cr 3757ms 13ms 4.5MB 3747ms 0ms crystal 1.16.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 6-m.js 654ms 3.1ms 119.7MB 2343ms 57ms node 24.4.0
crystal 1.cr 948ms 9.2ms 4.4MB 937ms 0ms crystal 1.16.3

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 238ms 1.0ms 3.9MB 230ms 0ms crystal 1.16.3
javascript 6-m.js 273ms 2.7ms 116.3MB 840ms 53ms node 24.4.0