Programming Language and compiler
Benchmarks

Kotlin 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
kotlin 1.kt 502ms 0.9ms 575.9MB 597ms 100ms kotlin/jvm 21
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
kotlin 1.kt 4076ms 141ms 134.1MB 4270ms 63ms kotlin/native 2.1.20

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
kotlin 1.kt 122ms 1.3ms 159.4MB 143ms 30ms kotlin/jvm 21
javascript 1.js 128ms 1.6ms 81.3MB 130ms 20ms node 24.4.0
kotlin 1.kt 232ms 38ms 17.6MB 243ms 3ms kotlin/native 2.1.20

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 1600ms 6.3ms 189.8MB 1570ms 100ms node 24.4.0
kotlin 2-m.kt 1827ms 163ms 237.7MB 6800ms 107ms kotlin/jvm 21
kotlin 1.kt 2186ms 6.6ms 220.6MB 2997ms 70ms kotlin/jvm 21
javascript 1.js 2457ms 68ms 101.6MB 2500ms 63ms bun 1.2.18
kotlin 2-m.kt 4215ms 20ms 21.1MB 14100ms 557ms kotlin/native 2.1.20
kotlin 1.kt timeout 0.0ms 17.3MB 5513ms 27ms kotlin/native 2.1.20

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
kotlin 2-m.kt 247ms 1.2ms 21.4MB 833ms 37ms kotlin/native 2.1.20
kotlin 1.kt 402ms 30ms 17.5MB 410ms 7ms kotlin/native 2.1.20
kotlin 1-m.kt 479ms 3.4ms 75.2MB 1080ms 47ms kotlin/jvm 21
kotlin 2-m.kt 877ms 85ms 99.4MB 3073ms 70ms kotlin/jvm 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 2.2ms 0.1ms 3.0MB 0ms 0ms kotlin/native 2.1.20
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
kotlin 1.kt 62ms 0.6ms 47.7MB 74ms 18ms kotlin/jvm 21

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
kotlin 2-m.kt 811ms 1405ms 357.9MB 10610ms 1887ms kotlin/jvm 21
javascript 1.js 2524ms 226ms 270.7MB 2467ms 1187ms node 24.4.0
kotlin 1.kt timeout 0.0ms 369.3MB 16190ms 2853ms kotlin/jvm 21

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
kotlin 1-m.kt 2031ms 194ms 211.9MB 5813ms 603ms kotlin/jvm 21
kotlin 2-m.kt 2032ms 138ms 242.0MB 5440ms 617ms kotlin/jvm 21

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 64ms 1.3ms 62.4MB 37ms 13ms bun 1.2.18
javascript 1.js 102ms 0.9ms 74.8MB 90ms 20ms node 24.4.0
kotlin 1-m.kt 732ms 78ms 173.7MB 1963ms 80ms kotlin/jvm 21

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 352ms 0.8ms 200.9MB 317ms 83ms bun 1.2.18
javascript 1.js 575ms 2.3ms 204.0MB 600ms 110ms node 24.4.0
kotlin 1-m.kt 1722ms 19ms 650.0MB 4150ms 150ms kotlin/jvm 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2.kt 166ms 1.3ms 12.4MB 170ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 192ms 1.4ms 95.1MB 327ms 27ms kotlin/jvm 21
kotlin 2-m.kt 201ms 1.3ms 101.4MB 460ms 30ms kotlin/jvm 21
javascript 2.js 308ms 3.4ms 64.9MB 300ms 10ms node 24.4.0
kotlin 1.kt 355ms 2.2ms 12.5MB 360ms 0ms kotlin/native 2.1.20
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
kotlin 2-m.kt 315ms 3.2ms 213.2MB 557ms 47ms kotlin/jvm 21
kotlin 1.kt 344ms 7.7ms 202.9MB 473ms 37ms kotlin/jvm 21
kotlin 2.kt 477ms 5.7ms 12.4MB 507ms 0ms kotlin/native 2.1.20
javascript 2.js 837ms 7.0ms 71.6MB 820ms 17ms node 24.4.0
kotlin 1.kt 1032ms 3.9ms 12.5MB 1060ms 0ms kotlin/native 2.1.20
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
kotlin 2.kt 94ms 0.6ms 12.8MB 87ms 0ms kotlin/native 2.1.20
kotlin 1.kt 120ms 1.0ms 12.8MB 120ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 153ms 2.7ms 91.1MB 290ms 30ms kotlin/jvm 21
javascript 2.js 163ms 0.9ms 59.3MB 157ms 10ms node 24.4.0
kotlin 2-m.kt 167ms 13ms 96.2MB 343ms 33ms kotlin/jvm 21
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

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 387ms 9.9ms 680.6MB 443ms 93ms kotlin/jvm 21
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
kotlin 1.kt 1895ms 31ms 90.1MB 1967ms 43ms kotlin/native 2.1.20

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
kotlin 1-m.kt 155ms 0.4ms 207.1MB 213ms 40ms kotlin/jvm 21
javascript 1.js 157ms 1.0ms 100.4MB 153ms 33ms node 24.4.0
kotlin 1.kt 267ms 13ms 25.5MB 270ms 13ms kotlin/native 2.1.20

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1n.kt 354ms 5.0ms 3.6MB 343ms 0ms kotlin/native 2.1.20
kotlin 1.kt 443ms 0.3ms 49.2MB 487ms 13ms kotlin/jvm 21
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
kotlin 1n.kt 39ms 1.6ms 3.6MB 30ms 0ms kotlin/native 2.1.20
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
kotlin 1-m.kt 119ms 1.7ms 49.5MB 170ms 13ms kotlin/jvm 21

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 3757ms 42ms 354.4MB 4560ms 113ms kotlin/jvm 21
javascript 3.js 4804ms 45ms 122.6MB 4760ms 47ms node 24.4.0
kotlin 1n.kt timeout 0.0ms 26.6MB 3957ms 1507ms kotlin/native 2.1.20
kotlin 2n.kt timeout 0.0ms 30.6MB 5110ms 133ms kotlin/native 2.1.20

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 990ms 32ms 353.0MB 1737ms 93ms kotlin/jvm 21
javascript 3.js 1034ms 5.1ms 73.9MB 1010ms 17ms node 24.4.0
kotlin 1n.kt timeout 0.0ms 26.3MB 3987ms 1517ms kotlin/native 2.1.20
kotlin 2n.kt timeout 0.0ms 30.9MB 5117ms 123ms kotlin/native 2.1.20

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt timeout 0.0ms 173.5MB 5407ms 40ms kotlin/jvm 21
kotlin 1n.kt timeout 0.0ms 226.8MB 5060ms 130ms kotlin/native 2.1.20

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 830ms 6.8ms 134.5MB 1273ms 37ms kotlin/jvm 21
kotlin 1n.kt 3212ms 16ms 51.0MB 3280ms 80ms kotlin/native 2.1.20

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 2515ms 10ms 62.1MB 2517ms 10ms node 24.4.0
javascript 1.js 2811ms 7.5ms 83.4MB 2830ms 50ms bun 1.2.18
kotlin 1.kt 3105ms 26ms 233.3MB 3997ms 67ms kotlin/jvm 21

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 672ms 3.5ms 58.8MB 680ms 7ms node 24.4.0
javascript 1.js 742ms 1.2ms 82.3MB 740ms 30ms bun 1.2.18
kotlin 1-m.kt 1013ms 41ms 232.1MB 1923ms 67ms kotlin/jvm 21