Programming Language and compiler
Benchmarks

Javascript VS Kotlin 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
kotlin 1.kt 502ms 3.0ms 581.8MB 603ms 93ms kotlin/jvm 21
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
kotlin 1.kt 4205ms 55ms 144.8MB 4410ms 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 100ms 0.8ms 77.5MB 77ms 27ms bun 1.2.17
kotlin 1.kt 121ms 3.5ms 163.1MB 150ms 30ms kotlin/jvm 21
javascript 1.js 127ms 1.5ms 81.2MB 130ms 20ms node 24.2.0
kotlin 1.kt 219ms 14ms 17.7MB 223ms 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 1629ms 9.3ms 189.9MB 1603ms 103ms node 24.2.0
kotlin 2-m.kt 1914ms 60ms 234.2MB 7147ms 110ms kotlin/jvm 21
kotlin 1.kt 2192ms 8.0ms 218.7MB 3023ms 70ms kotlin/jvm 21
javascript 1.js 2507ms 85ms 101.4MB 2553ms 67ms bun 1.2.17
kotlin 2-m.kt 4300ms 30ms 21.1MB 14380ms 537ms 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 2.0ms 75.4MB 140ms 23ms node 24.2.0
javascript 1.js 200ms 4.1ms 86.8MB 237ms 30ms bun 1.2.17
kotlin 2-m.kt 249ms 2.2ms 21.4MB 840ms 40ms kotlin/native 2.1.20
kotlin 1.kt 389ms 6.7ms 17.4MB 397ms 7ms kotlin/native 2.1.20
kotlin 1-m.kt 482ms 16ms 75.4MB 1090ms 40ms kotlin/jvm 21
kotlin 2-m.kt 814ms 72ms 95.6MB 2813ms 77ms kotlin/jvm 21

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
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
kotlin 1.kt 2.1ms 0.1ms 3.0MB 0ms 0ms kotlin/native 2.1.20
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
kotlin 1-m.kt 62ms 0.8ms 47.8MB 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 270ms 14ms 75.3MB 140ms 333ms bun 1.2.17
javascript 1.js 2465ms 105ms 269.7MB 2423ms 1127ms node 24.2.0
kotlin 2-m.kt 4779ms 156ms 415.1MB 14780ms 2513ms kotlin/jvm 21
kotlin 1.kt timeout 0.0ms 397.0MB 16267ms 2767ms kotlin/jvm 21

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
kotlin 1-m.kt 2041ms 202ms 241.1MB 5747ms 710ms kotlin/jvm 21
kotlin 2-m.kt 2177ms 125ms 242.9MB 5933ms 677ms 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 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
kotlin 1-m.kt 766ms 91ms 171.9MB 2060ms 83ms kotlin/jvm 21

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
kotlin 1-m.kt 1844ms 20ms 667.3MB 4333ms 157ms 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 1.9ms 12.4MB 167ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 197ms 7.4ms 94.7MB 323ms 30ms kotlin/jvm 21
kotlin 2-m.kt 201ms 1.6ms 102.7MB 457ms 37ms kotlin/jvm 21
javascript 2.js 305ms 0.7ms 65.3MB 293ms 10ms node 24.2.0
kotlin 1.kt 375ms 17ms 12.4MB 380ms 0ms kotlin/native 2.1.20
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
kotlin 2-m.kt 317ms 2.5ms 210.7MB 540ms 50ms kotlin/jvm 21
kotlin 1.kt 341ms 2.0ms 203.0MB 457ms 40ms kotlin/jvm 21
kotlin 2.kt 475ms 2.5ms 12.5MB 503ms 0ms kotlin/native 2.1.20
javascript 2.js 835ms 6.9ms 71.9MB 820ms 17ms node 24.2.0
kotlin 1.kt 1046ms 1.8ms 12.5MB 1073ms 3ms kotlin/native 2.1.20
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
kotlin 2.kt 95ms 0.1ms 12.8MB 87ms 0ms kotlin/native 2.1.20
kotlin 1.kt 122ms 1.1ms 12.8MB 117ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 153ms 4.0ms 92.4MB 293ms 27ms kotlin/jvm 21
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
kotlin 2-m.kt 170ms 16ms 95.9MB 367ms 37ms kotlin/jvm 21
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
kotlin 1.kt 394ms 11ms 680.4MB 447ms 93ms kotlin/jvm 21
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
kotlin 1.kt 1937ms 26ms 90.4MB 2023ms 40ms kotlin/native 2.1.20

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
kotlin 1-m.kt 159ms 3.2ms 207.4MB 210ms 43ms kotlin/jvm 21
javascript 1.js 160ms 2.6ms 101.3MB 157ms 40ms node 24.2.0
kotlin 1.kt 288ms 11ms 25.8MB 290ms 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 354ms 2.9ms 3.6MB 343ms 0ms kotlin/native 2.1.20
kotlin 1.kt 444ms 1.3ms 49.7MB 487ms 20ms kotlin/jvm 21
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
kotlin 1n.kt 40ms 1.0ms 3.5MB 30ms 0ms kotlin/native 2.1.20
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
kotlin 1-m.kt 121ms 1.7ms 49.7MB 167ms 17ms kotlin/jvm 21

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
kotlin 1.kt 3088ms 35ms 232.4MB 4080ms 73ms kotlin/jvm 21

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
kotlin 1-m.kt 982ms 20ms 231.5MB 1887ms 53ms kotlin/jvm 21

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 3774ms 15ms 353.5MB 4633ms 110ms kotlin/jvm 21
javascript 3.js 4612ms 24ms 122.4MB 4567ms 43ms node 24.2.0
kotlin 1n.kt timeout 0.0ms 26.6MB 4053ms 1487ms kotlin/native 2.1.20
kotlin 2n.kt timeout 0.0ms 30.6MB 5113ms 140ms kotlin/native 2.1.20

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 3.js 1016ms 4.2ms 74.0MB 997ms 17ms node 24.2.0
kotlin 1-m.kt 1024ms 7.6ms 352.8MB 1743ms 87ms kotlin/jvm 21
kotlin 1n.kt timeout 0.0ms 26.9MB 4010ms 1517ms kotlin/native 2.1.20
kotlin 2n.kt timeout 0.0ms 30.7MB 5123ms 140ms kotlin/native 2.1.20

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

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

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 6-m.js 271ms 4.8ms 115.9MB 830ms 53ms node 24.2.0