Programming Language and compiler
Benchmarks

Kotlin VS Javascript benchmarks

Current benchmark data was generated on Sat Mar 29 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 492ms 35ms 1223.9MB 553ms 103ms kotlin/jvm 21
javascript 1-m.js 952ms 9.6ms 197.4MB 1437ms 220ms bun 1.2.7
javascript 1-m.js 1321ms 107ms 289.4MB 2197ms 167ms node 23.10.0
kotlin 1-m.kt 3082ms 15ms 246.4MB 5163ms 690ms kotlin/native 1.8.21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 102ms 1.5ms 79.8MB 73ms 30ms bun 1.2.7
kotlin 1.kt 104ms 0.8ms 160.3MB 113ms 27ms kotlin/jvm 21
javascript 1.js 126ms 1.1ms 78.6MB 127ms 27ms node 23.10.0
kotlin 1-m.kt 276ms 9.6ms 30.3MB 443ms 57ms kotlin/native 1.8.21

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 1657ms 78ms 90.1MB 1733ms 57ms node 23.10.0
kotlin 2-m.kt 1734ms 92ms 234.6MB 6420ms 97ms kotlin/jvm 21
kotlin 1.kt 2168ms 9.4ms 222.7MB 3003ms 67ms kotlin/jvm 21
javascript 1.js 2569ms 29ms 101.5MB 2587ms 67ms bun 1.2.7
kotlin 1.kt timeout 0.0ms 12.9MB 6077ms 487ms kotlin/native 1.8.21
kotlin 2-m.kt timeout 0.0ms 117.1MB 18960ms 167ms kotlin/native 1.8.21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 190ms 9.3ms 72.5MB 173ms 23ms node 23.10.0
javascript 1.js 203ms 1.1ms 87.2MB 223ms 30ms bun 1.2.7
kotlin 2-m.kt 426ms 4.7ms 25.0MB 1567ms 20ms kotlin/native 1.8.21
kotlin 1-m.kt 474ms 4.8ms 76.6MB 1057ms 50ms kotlin/jvm 21
kotlin 1.kt 689ms 16ms 8.8MB 813ms 67ms kotlin/native 1.8.21
kotlin 2-m.kt 780ms 21ms 100.6MB 2703ms 63ms kotlin/jvm 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 1.9ms 0.2ms 2.6MB 0ms 0ms kotlin/native 1.8.21
javascript 1.js 13ms 0.4ms 33.1MB 0ms 10ms bun 1.2.7
javascript 1.js 31ms 0.6ms 48.0MB 18ms 4ms node 23.10.0
kotlin 1.kt 52ms 0.7ms 47.2MB 62ms 14ms 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 343ms 16ms 77.8MB 147ms 433ms bun 1.2.7
javascript 1.js 3165ms 343ms 189.8MB 3050ms 1443ms node 23.10.0
kotlin 2-m.kt 4775ms 56ms 442.2MB 14967ms 2663ms kotlin/jvm 21
kotlin 1.kt timeout 0.0ms 391.3MB 16150ms 2790ms kotlin/jvm 21

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.bun.js 117ms 3.9ms 55.3MB 40ms 107ms bun 1.2.7
javascript 1.js 364ms 0.9ms 79.9MB 330ms 137ms node 23.10.0
kotlin 1-m.kt 2114ms 204ms 206.1MB 5923ms 717ms kotlin/jvm 21
kotlin 2-m.kt 2322ms 100ms 242.4MB 5993ms 683ms 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 76ms 1.2ms 71.4MB 50ms 17ms bun 1.2.7
javascript 1.js 110ms 2.0ms 75.9MB 97ms 23ms node 23.10.0
kotlin 1-m.kt 835ms 90ms 208.3MB 2240ms 100ms kotlin/jvm 21

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 410ms 2.1ms 268.4MB 337ms 113ms bun 1.2.7
javascript 1.js 689ms 4.0ms 200.8MB 807ms 77ms node 23.10.0
kotlin 1-m.kt 2326ms 37ms 834.4MB 5107ms 183ms kotlin/jvm 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 183ms 4.3ms 96.4MB 297ms 23ms kotlin/jvm 21
kotlin 2-m.kt 198ms 3.5ms 105.0MB 417ms 30ms kotlin/jvm 21
kotlin 2.kt 306ms 5.2ms 5.8MB 433ms 13ms kotlin/native 1.8.21
javascript 2.js 308ms 1.4ms 62.7MB 297ms 13ms node 23.10.0
kotlin 1.kt 513ms 4.5ms 5.9MB 613ms 7ms kotlin/native 1.8.21
javascript 1.js 557ms 2.0ms 60.6MB 543ms 13ms node 23.10.0
javascript 2.js 656ms 6.7ms 122.7MB 707ms 63ms bun 1.2.7
javascript 1.js 826ms 4.9ms 107.5MB 920ms 73ms bun 1.2.7

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2-m.kt 312ms 12ms 214.5MB 533ms 50ms kotlin/jvm 21
kotlin 1.kt 329ms 7.5ms 204.7MB 423ms 53ms kotlin/jvm 21
javascript 2.js 849ms 6.1ms 68.1MB 837ms 20ms node 23.10.0
kotlin 2.kt 909ms 6.8ms 5.9MB 1307ms 47ms kotlin/native 1.8.21
kotlin 1.kt 1558ms 23ms 5.9MB 1883ms 23ms kotlin/native 1.8.21
javascript 1.js 1587ms 4.1ms 67.7MB 1573ms 17ms node 23.10.0
javascript 2.js 1841ms 8.1ms 122.5MB 2017ms 77ms bun 1.2.7
javascript 1.js 2382ms 22ms 111.6MB 2693ms 157ms bun 1.2.7

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2.kt 140ms 1.7ms 3.6MB 193ms 0ms kotlin/native 1.8.21
kotlin 1-m.kt 140ms 7.2ms 92.4MB 263ms 30ms kotlin/jvm 21
kotlin 2-m.kt 162ms 16ms 95.6MB 337ms 30ms kotlin/jvm 21
javascript 1.js 163ms 0.7ms 57.9MB 150ms 10ms node 23.10.0
javascript 2.js 166ms 0.8ms 56.7MB 157ms 7ms node 23.10.0
kotlin 1.kt 170ms 1.5ms 3.8MB 213ms 0ms kotlin/native 1.8.21
javascript 1.js 323ms 2.8ms 115.8MB 357ms 83ms bun 1.2.7
javascript 2.js 360ms 4.2ms 126.4MB 380ms 50ms bun 1.2.7

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 360ms 8.1ms 681.4MB 397ms 80ms kotlin/jvm 21
javascript 1-m.js 484ms 16ms 141.9MB 637ms 120ms bun 1.2.7
javascript 1.js 530ms 4.5ms 130.3MB 607ms 67ms node 23.10.0
kotlin 1-m.kt 1499ms 4.3ms 134.5MB 2283ms 337ms kotlin/native 1.8.21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 116ms 2.7ms 86.8MB 100ms 33ms bun 1.2.7
kotlin 1.kt 130ms 2.8ms 208.5MB 157ms 33ms kotlin/jvm 21
javascript 1.js 159ms 1.1ms 98.3MB 160ms 37ms node 23.10.0
kotlin 1-m.kt 312ms 4.3ms 38.5MB 460ms 70ms kotlin/native 1.8.21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1n.kt 413ms 3.0ms 2.6MB 403ms 0ms kotlin/native 1.8.21
kotlin 1.kt 447ms 1.8ms 49.3MB 490ms 20ms kotlin/jvm 21
javascript 6.js 462ms 3.1ms 56.1MB 453ms 0ms node 23.10.0
javascript 6.js 782ms 14ms 46.1MB 777ms 3ms bun 1.2.7

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1n.kt 45ms 1.9ms 2.6MB 40ms 0ms kotlin/native 1.8.21
javascript 6.js 78ms 0.6ms 56.1MB 67ms 7ms node 23.10.0
javascript 6.js 99ms 1.4ms 46.1MB 93ms 7ms bun 1.2.7
kotlin 1-m.kt 120ms 0.4ms 49.6MB 163ms 20ms kotlin/jvm 21

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 3753ms 45ms 355.1MB 4627ms 110ms kotlin/jvm 21
javascript 3.js timeout 0.0ms 88.4MB 4983ms 23ms node 23.10.0
kotlin 1n.kt timeout 0.0ms 5.5MB 6320ms 267ms kotlin/native 1.8.21
kotlin 2n.kt timeout 0.0ms 6.3MB 5000ms 167ms kotlin/native 1.8.21

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 983ms 29ms 355.6MB 1763ms 100ms kotlin/jvm 21
javascript 3.js 1104ms 5.3ms 70.7MB 1080ms 20ms node 23.10.0
kotlin 1n.kt timeout 0.0ms 5.5MB 6270ms 273ms kotlin/native 1.8.21
kotlin 2n.kt timeout 0.0ms 6.3MB 5010ms 150ms kotlin/native 1.8.21

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 171.2MB 5393ms 43ms kotlin/jvm 21
kotlin 1n.kt timeout 0.0ms 277.0MB 5430ms 493ms kotlin/native 1.8.21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 807ms 4.6ms 134.0MB 1223ms 40ms kotlin/jvm 21
kotlin 1n.kt 3182ms 11ms 63.1MB 3923ms 17ms kotlin/native 1.8.21

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 2575ms 11ms 60.0MB 2583ms 23ms node 23.10.0
javascript 1.js 2796ms 8.4ms 84.8MB 2807ms 60ms bun 1.2.7
kotlin 1.kt 3130ms 52ms 233.8MB 4123ms 70ms kotlin/jvm 21

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 677ms 1.5ms 57.1MB 683ms 13ms node 23.10.0
javascript 1.js 740ms 6.0ms 84.4MB 740ms 33ms bun 1.2.7
kotlin 1-m.kt 984ms 32ms 232.4MB 1807ms 57ms kotlin/jvm 21