Programming Language and compiler
Benchmarks

Kotlin VS Javascript benchmarks

Current benchmark data was generated on Mon May 19 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 491ms 9.8ms 576.6MB 603ms 80ms kotlin/jvm 21
javascript 1-m.js 983ms 44ms 182.9MB 1513ms 227ms bun 1.2.13
javascript 1.js 1066ms 5.1ms 468.4MB 1000ms 220ms node 24.0.2
kotlin 1.kt 4175ms 24ms 143.7MB 4367ms 73ms kotlin/native 2.1.20

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 102ms 0.9ms 77.4MB 83ms 23ms bun 1.2.13
kotlin 1.kt 121ms 0.9ms 159.3MB 150ms 30ms kotlin/jvm 21
javascript 1.js 130ms 2.5ms 80.7MB 130ms 27ms node 24.0.2
kotlin 1.kt 235ms 15ms 17.6MB 240ms 7ms 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 1619ms 9.4ms 188.9MB 1593ms 103ms node 24.0.2
kotlin 2-m.kt 1893ms 160ms 233.8MB 7030ms 100ms kotlin/jvm 21
kotlin 1.kt 2169ms 49ms 220.1MB 3017ms 67ms kotlin/jvm 21
javascript 1.js 2477ms 8.3ms 99.5MB 2507ms 57ms bun 1.2.13
kotlin 2-m.kt 4283ms 17ms 21.6MB 14280ms 553ms kotlin/native 2.1.20
kotlin 1.kt timeout 0.0ms 17.4MB 5517ms 30ms kotlin/native 2.1.20

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 158ms 3.0ms 74.0MB 143ms 23ms node 24.0.2
javascript 1.js 198ms 1.8ms 85.0MB 220ms 30ms bun 1.2.13
kotlin 2-m.kt 248ms 4.5ms 21.1MB 837ms 40ms kotlin/native 2.1.20
kotlin 1.kt 395ms 2.7ms 17.4MB 403ms 7ms kotlin/native 2.1.20
kotlin 1-m.kt 495ms 6.5ms 76.4MB 1130ms 40ms kotlin/jvm 21
kotlin 2-m.kt 920ms 72ms 97.4MB 3233ms 77ms kotlin/jvm 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 2.1ms 0.2ms 3.0MB 0ms 0ms kotlin/native 2.1.20
javascript 1.js 13ms 0.6ms 31.9MB 0ms 0ms bun 1.2.13
javascript 1.js 32ms 0.5ms 50.0MB 16ms 8ms node 24.0.2
kotlin 1.kt 64ms 5.9ms 47.6MB 78ms 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 265ms 10ms 76.7MB 137ms 343ms bun 1.2.13
kotlin 2-m.kt 1613ms 2795ms 455.2MB 15463ms 2483ms kotlin/jvm 21
javascript 1.js 2754ms 259ms 289.5MB 2697ms 1270ms node 24.0.2
kotlin 1.kt timeout 0.0ms 427.0MB 16450ms 2593ms kotlin/jvm 21

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.bun.js 94ms 4.8ms 55.0MB 33ms 70ms bun 1.2.13
javascript 1.js 353ms 2.2ms 84.3MB 343ms 123ms node 24.0.2
kotlin 1-m.kt 2080ms 193ms 220.2MB 5967ms 640ms kotlin/jvm 21
kotlin 2-m.kt 2084ms 210ms 242.8MB 5633ms 620ms 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 75ms 8.3ms 67.5MB 47ms 20ms bun 1.2.13
javascript 1.js 106ms 3.5ms 73.9MB 87ms 23ms node 24.0.2
kotlin 1-m.kt 776ms 95ms 175.3MB 2097ms 80ms kotlin/jvm 21

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 390ms 2.0ms 235.3MB 333ms 100ms bun 1.2.13
javascript 1.js 590ms 2.0ms 253.9MB 593ms 127ms node 24.0.2
kotlin 1-m.kt 1835ms 40ms 693.1MB 4310ms 167ms kotlin/jvm 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2.kt 168ms 4.4ms 12.4MB 170ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 192ms 2.4ms 94.9MB 323ms 20ms kotlin/jvm 21
kotlin 2-m.kt 209ms 14ms 101.4MB 453ms 43ms kotlin/jvm 21
javascript 2.js 305ms 1.5ms 64.5MB 297ms 10ms node 24.0.2
kotlin 1.kt 353ms 2.2ms 12.5MB 353ms 0ms kotlin/native 2.1.20
javascript 1.js 571ms 4.9ms 63.0MB 553ms 10ms node 24.0.2
javascript 2.js 665ms 6.1ms 124.1MB 717ms 50ms bun 1.2.13
javascript 1.js 825ms 5.5ms 109.9MB 920ms 73ms bun 1.2.13

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2-m.kt 313ms 0.5ms 214.0MB 540ms 50ms kotlin/jvm 21
kotlin 1.kt 340ms 2.2ms 203.2MB 463ms 37ms kotlin/jvm 21
kotlin 2.kt 474ms 3.0ms 12.4MB 500ms 7ms kotlin/native 2.1.20
javascript 2.js 835ms 0.7ms 70.6MB 817ms 20ms node 24.0.2
kotlin 1.kt 1035ms 8.5ms 12.4MB 1070ms 0ms kotlin/native 2.1.20
javascript 1.js 1622ms 1.9ms 69.6MB 1603ms 13ms node 24.0.2
javascript 2.js 1852ms 9.1ms 124.3MB 2033ms 73ms bun 1.2.13
javascript 1.js 2389ms 8.5ms 109.5MB 2717ms 163ms bun 1.2.13

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2.kt 95ms 0.4ms 12.8MB 87ms 3ms kotlin/native 2.1.20
kotlin 1.kt 121ms 0.9ms 12.8MB 110ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 153ms 3.0ms 90.4MB 287ms 30ms kotlin/jvm 21
javascript 2.js 166ms 2.3ms 59.0MB 160ms 10ms node 24.0.2
javascript 1.js 169ms 1.1ms 60.0MB 160ms 10ms node 24.0.2
kotlin 2-m.kt 169ms 8.2ms 95.6MB 340ms 30ms kotlin/jvm 21
javascript 1.js 320ms 1.9ms 114.0MB 363ms 73ms bun 1.2.13
javascript 2.js 361ms 1.8ms 123.9MB 380ms 53ms bun 1.2.13

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 395ms 2.5ms 678.6MB 450ms 83ms kotlin/jvm 21
javascript 1-m.js 486ms 0.8ms 138.7MB 660ms 113ms bun 1.2.13
javascript 1.js 579ms 3.1ms 229.5MB 577ms 120ms node 24.0.2
kotlin 1.kt 2036ms 172ms 90.1MB 2113ms 47ms kotlin/native 2.1.20

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 119ms 4.5ms 85.8MB 107ms 30ms bun 1.2.13
kotlin 1-m.kt 155ms 2.4ms 207.3MB 203ms 50ms kotlin/jvm 21
javascript 1.js 163ms 3.2ms 100.3MB 160ms 33ms node 24.0.2
kotlin 1.kt 293ms 4.6ms 25.6MB 297ms 10ms 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 353ms 3.9ms 3.6MB 343ms 0ms kotlin/native 2.1.20
kotlin 1.kt 445ms 1.8ms 49.2MB 490ms 20ms kotlin/jvm 21
javascript 6.js 458ms 3.2ms 58.0MB 443ms 10ms node 24.0.2
javascript 6.js 604ms 7.0ms 44.5MB 603ms 3ms bun 1.2.13

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1n.kt 39ms 0.2ms 3.6MB 30ms 0ms kotlin/native 2.1.20
javascript 6.js 80ms 1.6ms 58.2MB 70ms 7ms node 24.0.2
javascript 6.js 82ms 2.8ms 44.5MB 77ms 3ms bun 1.2.13
kotlin 1-m.kt 121ms 2.3ms 49.4MB 170ms 20ms kotlin/jvm 21

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 3724ms 64ms 352.5MB 4500ms 100ms kotlin/jvm 21
javascript 3.js 4622ms 14ms 122.3MB 4573ms 47ms node 24.0.2
kotlin 1n.kt timeout 0.0ms 26.3MB 3990ms 1497ms kotlin/native 2.1.20
kotlin 2n.kt timeout 0.0ms 30.6MB 5130ms 127ms kotlin/native 2.1.20

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 3.js 1012ms 8.0ms 73.2MB 993ms 13ms node 24.0.2
kotlin 1-m.kt 1018ms 20ms 353.5MB 1703ms 90ms kotlin/jvm 21
kotlin 1n.kt timeout 0.0ms 26.7MB 3990ms 1510ms kotlin/native 2.1.20
kotlin 2n.kt timeout 0.0ms 30.6MB 5113ms 130ms 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 173.6MB 5407ms 47ms kotlin/jvm 21
kotlin 1n.kt timeout 0.0ms 226.8MB 5080ms 117ms 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 839ms 12ms 134.6MB 1270ms 40ms kotlin/jvm 21
kotlin 1n.kt 3231ms 31ms 51.1MB 3300ms 70ms 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 2584ms 16ms 61.1MB 2590ms 10ms node 24.0.2
javascript 1.js 2875ms 42ms 82.4MB 2890ms 57ms bun 1.2.13
kotlin 1.kt 3038ms 2.3ms 231.8MB 4063ms 77ms kotlin/jvm 21

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 687ms 3.9ms 58.5MB 697ms 10ms node 24.0.2
javascript 1.js 746ms 8.0ms 82.4MB 747ms 30ms bun 1.2.13
kotlin 1-m.kt 979ms 51ms 232.1MB 1937ms 67ms kotlin/jvm 21