Programming Language and compiler
Benchmarks

Nim VS Kotlin benchmarks

Current benchmark data was generated on Thu May 01 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 10ms 578.8MB 590ms 93ms kotlin/jvm 21
nim 2.nim 775ms 6.2ms 33.9MB 757ms 10ms nim 2.2.4
nim 2.nim 953ms 12ms 35.2MB 933ms 7ms nim/clang 2.2.4
kotlin 1.kt 3846ms 34ms 144.1MB 4020ms 77ms kotlin/native 2.1.20

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 76ms 2.3ms 5.5MB 67ms 0ms nim 2.2.4
nim 2.nim 92ms 3.6ms 5.8MB 83ms 0ms nim/clang 2.2.4
kotlin 1.kt 121ms 3.2ms 163.1MB 143ms 33ms kotlin/jvm 21
kotlin 1.kt 204ms 3.4ms 17.6MB 210ms 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
kotlin 2-m.kt 1966ms 64ms 237.9MB 7327ms 110ms kotlin/jvm 21
kotlin 1.kt 2131ms 19ms 217.3MB 2937ms 73ms kotlin/jvm 21
kotlin 2-m.kt 4241ms 30ms 21.4MB 14193ms 557ms kotlin/native 2.1.20
kotlin 1.kt timeout 0.0ms 17.4MB 5507ms 27ms kotlin/native 2.1.20
nim 1.nim timeout 0.0ms 554.2MB 2543ms 1993ms nim 2.2.4
nim 1.nim timeout 0.0ms 552.6MB 2487ms 2053ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2-m.kt 250ms 1.5ms 21.3MB 833ms 47ms kotlin/native 2.1.20
kotlin 1.kt 387ms 13ms 17.4MB 397ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 480ms 15ms 74.4MB 1100ms 47ms kotlin/jvm 21
kotlin 2-m.kt 881ms 82ms 95.9MB 3080ms 67ms kotlin/jvm 21
nim 1.nim 4338ms 12ms 519.4MB 2163ms 1750ms nim 2.2.4
nim 1.nim 4380ms 6.7ms 518.6MB 2120ms 1837ms nim/clang 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 187ms 0.8ms 1.5MB 180ms 0ms nim 2.2.4
nim 2.nim 243ms 2.3ms 1.8MB 233ms 0ms nim/clang 2.2.4
nim 1.nim 550ms 1.7ms 1.8MB 440ms 100ms nim/clang 2.2.4
nim 1.nim 574ms 3.5ms 1.5MB 467ms 97ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 20ms 0.1ms 1.5MB 10ms 0ms nim 2.2.4
nim 2.nim 26ms 0.7ms 1.8MB 20ms 0ms nim/clang 2.2.4
nim 1.nim 58ms 0.4ms 1.8MB 40ms 3ms nim/clang 2.2.4
nim 1.nim 60ms 0.9ms 1.5MB 43ms 0ms nim 2.2.4

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.0ms 0.0ms 1.5MB 0ms 0ms nim 2.2.4
nim 1.nim 1.1ms 0.0ms 1.9MB 0ms 0ms nim/clang 2.2.4
kotlin 1.kt 2.2ms 0.2ms 3.1MB 0ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 61ms 0.9ms 47.6MB 78ms 16ms kotlin/jvm 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 112ms 3.7ms 1.6MB 103ms 0ms nim/clang 2.2.4
nim 2.nim 113ms 0.4ms 1.4MB 103ms 0ms nim 2.2.4
kotlin 1-m.kt 196ms 4.7ms 95.0MB 317ms 33ms kotlin/jvm 21
kotlin 2.kt 197ms 54ms 12.5MB 197ms 3ms kotlin/native 2.1.20
kotlin 2-m.kt 203ms 3.6ms 101.8MB 443ms 37ms kotlin/jvm 21
kotlin 1.kt 359ms 0.8ms 12.4MB 363ms 0ms kotlin/native 2.1.20
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2-m.kt 316ms 6.8ms 213.9MB 543ms 50ms kotlin/jvm 21
nim 2.nim 325ms 2.2ms 1.6MB 320ms 0ms nim/clang 2.2.4
nim 2.nim 337ms 3.0ms 1.4MB 327ms 0ms nim 2.2.4
kotlin 1.kt 342ms 5.5ms 202.7MB 460ms 30ms kotlin/jvm 21
kotlin 2.kt 485ms 11ms 12.4MB 523ms 0ms kotlin/native 2.1.20
kotlin 1.kt 1055ms 17ms 12.5MB 1087ms 3ms kotlin/native 2.1.20
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 49ms 0.5ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 51ms 0.7ms 1.3MB 40ms 0ms nim 2.2.4
kotlin 2.kt 93ms 1.7ms 12.9MB 87ms 0ms kotlin/native 2.1.20
kotlin 1.kt 122ms 1.5ms 12.8MB 113ms 3ms kotlin/native 2.1.20
kotlin 1-m.kt 150ms 3.8ms 90.8MB 293ms 20ms kotlin/jvm 21
kotlin 2-m.kt 163ms 4.5ms 96.5MB 353ms 27ms kotlin/jvm 21
nim 1.nim 488ms 11ms 1.5MB 480ms 0ms nim/clang 2.2.4
nim 1.nim 493ms 16ms 1.3MB 483ms 0ms nim 2.2.4

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 387ms 1.0ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 579ms 4.0ms 4.5MB 570ms 0ms nim 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 19ms 0.5ms 1.9MB 10ms 0ms nim/clang 2.2.4
nim 1.nim 26ms 0.6ms 1.6MB 20ms 0ms nim 2.2.4

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 406ms 17ms 680.2MB 453ms 90ms kotlin/jvm 21
nim 1.nim 545ms 3.9ms 34.9MB 523ms 7ms nim 2.2.4
nim 1.nim 627ms 17ms 35.2MB 610ms 3ms nim/clang 2.2.4
kotlin 1.kt 1821ms 13ms 89.8MB 1913ms 43ms kotlin/native 2.1.20

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 117ms 2.0ms 9.6MB 107ms 0ms nim 2.2.4
nim 1.nim 133ms 1.1ms 9.9MB 120ms 0ms nim/clang 2.2.4
kotlin 1-m.kt 159ms 7.9ms 207.3MB 207ms 40ms kotlin/jvm 21
kotlin 1.kt 259ms 1.7ms 24.9MB 263ms 10ms kotlin/native 2.1.20

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 320ms 1.7ms 1.8MB 310ms 0ms nim 2.2.4
nim 2.nim 344ms 1.7ms 2.0MB 337ms 0ms nim/clang 2.2.4
kotlin 1n.kt 350ms 1.7ms 3.5MB 340ms 0ms kotlin/native 2.1.20
kotlin 1.kt 443ms 1.3ms 49.4MB 487ms 13ms kotlin/jvm 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 35ms 0.5ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 37ms 0.5ms 2.0MB 30ms 0ms nim/clang 2.2.4
kotlin 1n.kt 39ms 0.9ms 3.6MB 30ms 0ms kotlin/native 2.1.20
kotlin 1-m.kt 119ms 0.7ms 49.7MB 167ms 20ms kotlin/jvm 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 269ms 7.3ms 41.5MB 260ms 0ms nim 2.2.4
nim 1.nim 318ms 3.3ms 41.8MB 307ms 0ms nim/clang 2.2.4

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 54ms 4.3ms 11.5MB 47ms 0ms nim 2.2.4
nim 1.nim 65ms 1.4ms 11.8MB 57ms 0ms nim/clang 2.2.4

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1644ms 4.7ms 152.4MB 1610ms 20ms nim/clang 2.2.4
nim 1.nim 1672ms 7.2ms 152.1MB 1640ms 20ms nim 2.2.4
kotlin 1.kt timeout 0.0ms 173.5MB 5410ms 47ms 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
nim 1.nim 173ms 1.3ms 17.6MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 177ms 3.1ms 17.4MB 163ms 0ms nim 2.2.4
kotlin 1-m.kt 842ms 18ms 134.5MB 1290ms 40ms kotlin/jvm 21
kotlin 1n.kt 3207ms 14ms 51.3MB 3277ms 73ms kotlin/native 2.1.20

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 3589ms 1.3ms 1.6MB 3580ms 0ms nim/clang 2.2.4
nim 1.nim 3603ms 8.0ms 1.4MB 3597ms 0ms nim 2.2.4

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 899ms 0.2ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 904ms 4.4ms 1.3MB 893ms 0ms nim 2.2.4

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 227ms 0.6ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 228ms 1.2ms 1.3MB 220ms 0ms nim 2.2.4