Programming Language and compiler
Benchmarks

Javascript VS Crystal 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
javascript 1-m.js 947ms 18ms 176.8MB 1447ms 207ms bun 1.2.17
javascript 1.js 1054ms 6.2ms 453.4MB 980ms 223ms node 24.2.0
crystal 1.cr 1282ms 30ms 64.2MB 1257ms 10ms crystal 1.16.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 100ms 0.8ms 77.5MB 77ms 27ms bun 1.2.17
crystal 1.cr 109ms 0.7ms 11.0MB 97ms 0ms crystal 1.16.3
javascript 1.js 127ms 1.5ms 81.2MB 130ms 20ms node 24.2.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1505ms 22ms 19.9MB 1440ms 53ms crystal 1.16.3
javascript 1.js 1629ms 9.3ms 189.9MB 1603ms 103ms node 24.2.0
javascript 1.js 2507ms 85ms 101.4MB 2553ms 67ms bun 1.2.17

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 85ms 1.6ms 7.1MB 63ms 10ms crystal 1.16.3
javascript 1.js 158ms 2.0ms 75.4MB 140ms 23ms node 24.2.0
javascript 1.js 200ms 4.1ms 86.8MB 237ms 30ms bun 1.2.17

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 58ms 1.4ms 6.4MB 43ms 0ms crystal 1.16.3
javascript 1.js 302ms 4.5ms 67.7MB 320ms 23ms node 24.2.0
javascript 1.js 519ms 3.3ms 75.7MB 497ms 20ms bun 1.2.17

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 23ms 1.5ms 5.3MB 10ms 0ms crystal 1.16.3
javascript 1.js 136ms 13ms 64.5MB 120ms 17ms node 24.2.0
javascript 1.js 512ms 13ms 65.7MB 487ms 23ms bun 1.2.17

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 13ms 0.5ms 31.3MB 0ms 0ms bun 1.2.17
javascript 1.js 33ms 1.9ms 50.9MB 18ms 8ms node 24.2.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1-m.bun.js 270ms 14ms 75.3MB 140ms 333ms bun 1.2.17
crystal 1.cr 2297ms 153ms 300.0MB 313ms 450ms crystal 1.16.3
javascript 1.js 2465ms 105ms 269.7MB 2423ms 1127ms node 24.2.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.bun.js 104ms 11ms 55.4MB 37ms 83ms bun 1.2.17
javascript 1.js 375ms 26ms 85.9MB 360ms 133ms node 24.2.0
crystal 1.cr 1282ms 15ms 53.0MB 33ms 70ms crystal 1.16.3

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 65ms 1.2ms 62.5MB 40ms 13ms bun 1.2.17
javascript 1.js 104ms 1.9ms 74.8MB 90ms 20ms node 24.2.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 350ms 1.2ms 200.9MB 303ms 87ms bun 1.2.17
javascript 1.js 573ms 4.9ms 254.9MB 590ms 117ms node 24.2.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 36ms 0.9ms 3.0MB 30ms 0ms crystal 1.16.3
crystal 1.cr 65ms 1.9ms 3.0MB 60ms 0ms crystal 1.16.3
javascript 2.js 305ms 0.7ms 65.3MB 293ms 10ms node 24.2.0
javascript 1.js 565ms 3.2ms 63.6MB 550ms 13ms node 24.2.0
javascript 2.js 669ms 8.0ms 122.9MB 737ms 53ms bun 1.2.17
javascript 1.js 843ms 21ms 106.1MB 907ms 93ms bun 1.2.17

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 101ms 2.3ms 3.0MB 93ms 0ms crystal 1.16.3
crystal 1.cr 186ms 0.8ms 3.0MB 180ms 0ms crystal 1.16.3
javascript 2.js 835ms 6.9ms 71.9MB 820ms 17ms node 24.2.0
javascript 1.js 1619ms 16ms 70.0MB 1603ms 13ms node 24.2.0
javascript 2.js 1893ms 6.7ms 123.5MB 2067ms 73ms bun 1.2.17
javascript 1.js 2431ms 36ms 105.9MB 2720ms 160ms bun 1.2.17

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 19ms 1.1ms 3.0MB 10ms 0ms crystal 1.16.3
crystal 1.cr 30ms 0.6ms 3.0MB 20ms 0ms crystal 1.16.3
javascript 2.js 163ms 1.1ms 59.8MB 157ms 10ms node 24.2.0
javascript 1.js 166ms 2.3ms 61.0MB 150ms 10ms node 24.2.0
javascript 1.js 327ms 3.4ms 130.8MB 357ms 80ms bun 1.2.17
javascript 2.js 368ms 3.7ms 124.9MB 393ms 60ms bun 1.2.17

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1-m.js 473ms 10ms 137.8MB 617ms 117ms bun 1.2.17
javascript 1.js 565ms 6.5ms 230.7MB 567ms 110ms node 24.2.0
crystal 1.cr 880ms 16ms 64.2MB 857ms 10ms crystal 1.16.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 116ms 2.9ms 84.8MB 100ms 33ms bun 1.2.17
javascript 1.js 160ms 2.6ms 101.3MB 157ms 40ms node 24.2.0
crystal 1.cr 173ms 3.0ms 22.2MB 157ms 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 342ms 1.3ms 3.3MB 330ms 0ms crystal 1.16.3
crystal 1.cr 344ms 2.9ms 3.3MB 333ms 0ms crystal 1.16.3
javascript 6.js 456ms 0.7ms 59.0MB 450ms 0ms node 24.2.0
javascript 6.js 599ms 2.6ms 44.9MB 603ms 7ms bun 1.2.17

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 38ms 0.4ms 3.3MB 30ms 0ms crystal 1.16.3
crystal 1.cr 38ms 1.4ms 3.3MB 30ms 0ms crystal 1.16.3
javascript 6.js 79ms 1.4ms 58.9MB 63ms 10ms node 24.2.0
javascript 6.js 82ms 2.6ms 44.9MB 83ms 10ms bun 1.2.17

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 2530ms 12ms 61.9MB 2537ms 10ms node 24.2.0
javascript 1.js 2803ms 2.3ms 82.0MB 2810ms 60ms bun 1.2.17

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 704ms 57ms 60.1MB 707ms 10ms node 24.2.0
javascript 1.js 729ms 4.2ms 81.9MB 727ms 27ms bun 1.2.17

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1928ms 26ms 6.3MB 1897ms 17ms crystal 1.16.3
javascript 3.js 4612ms 24ms 122.4MB 4567ms 43ms node 24.2.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 447ms 9.3ms 4.9MB 433ms 0ms crystal 1.16.3
javascript 3.js 1016ms 4.2ms 74.0MB 997ms 17ms node 24.2.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 6-m.js 2170ms 4.5ms 118.6MB 8280ms 63ms node 24.2.0
crystal 1.cr 3760ms 10ms 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 2.1ms 118.9MB 2317ms 63ms node 24.2.0
crystal 1.cr 949ms 7.6ms 4.4MB 940ms 0ms crystal 1.16.3

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 241ms 5.4ms 3.8MB 233ms 0ms crystal 1.16.3
javascript 6-m.js 271ms 4.8ms 115.9MB 830ms 53ms node 24.2.0