Programming Language and compiler
Benchmarks

Results for 38 of 40 languages from this run on actest1.

Unavailable in this run: Hack, Lisp. Follow the run link for failure details.

Kotlin VS Rust benchmarks

Current benchmark data was generated on Sun Sep 27 2026, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] Intel(R) Core(TM) i7-3687U CPU @ 2.10GHz (Model 58)

* -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 794ms 80ms 581.9MB 1017ms 130ms kotlin/jvm 21.0.12
rust 5.rs 2161ms 12ms 33.8MB 2140ms 3ms rustc 1.98.1
rust 3.rs 2212ms 49ms 49.8MB 2183ms 10ms rustc 1.98.1
rust 4.rs 2253ms 19ms 33.8MB 2230ms 10ms rustc 1.98.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5.rs 185ms 4.9ms 5.7MB 173ms 0ms rustc 1.98.1
kotlin 1.kt 188ms 30ms 159.7MB 233ms 30ms kotlin/jvm 21.0.12
rust 4.rs 203ms 1.5ms 5.7MB 190ms 0ms rustc 1.98.1
rust 3.rs 205ms 20ms 7.8MB 190ms 0ms rustc 1.98.1

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 776ms 8.2ms 5.2MB 2963ms 60ms rustc 1.98.1
rust 3-m.rs 1159ms 98ms 8.8MB 4437ms 87ms rustc 1.98.1
rust 1-m.rs 1841ms 27ms 8.6MB 6870ms 303ms rustc 1.98.1
rust 3.rs 2252ms 19ms 9.1MB 2177ms 60ms rustc 1.98.1
kotlin 2-m.kt 3342ms 283ms 229.6MB 12590ms 123ms kotlin/jvm 21.0.12
kotlin 1.kt 3615ms 290ms 219.6MB 4723ms 107ms kotlin/jvm 21.0.12
rust 4.rs 3680ms 17ms 7.3MB 3663ms 3ms rustc 1.98.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 80ms 20ms 3.2MB 270ms 0ms rustc 1.98.1
rust 3-m.rs 81ms 11ms 5.8MB 260ms 10ms rustc 1.98.1
rust 3.rs 128ms 4.2ms 3.9MB 113ms 0ms rustc 1.98.1
rust 1-m.rs 128ms 3.9ms 5.5MB 437ms 23ms rustc 1.98.1
rust 4.rs 243ms 10ms 3.3MB 233ms 0ms rustc 1.98.1
kotlin 1-m.kt 738ms 7.2ms 77.4MB 1727ms 47ms kotlin/jvm 21.0.12
kotlin 2-m.kt 1625ms 206ms 97.5MB 5807ms 100ms kotlin/jvm 21.0.12

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1.6ms 0.3ms 1.9MB 0ms 0ms rustc 1.98.1
kotlin 1-m.kt 87ms 4.3ms 46.2MB 136ms 12ms kotlin/jvm 21.0.12

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1-m.rs 402ms 47ms 74.0MB 273ms 500ms rustc 1.98.1
rust 2-m.rs 637ms 65ms 66.2MB 390ms 877ms rustc 1.98.1
rust 2-http2.rs 728ms 174ms 57.0MB 1683ms 507ms rustc 1.98.1
rust 1-http2.rs 737ms 86ms 68.5MB 1713ms 540ms rustc 1.98.1
kotlin 2-m.kt 9841ms 283ms 341.7MB 32387ms 3343ms kotlin/jvm 21.0.12
kotlin 1-m.kt 11376ms 242ms 433.1MB 37790ms 4520ms kotlin/jvm 21.0.12

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 129ms 6.7ms 17.4MB 43ms 57ms rustc 1.98.1
rust 2.rs 210ms 23ms 22.9MB 63ms 180ms rustc 1.98.1
rust 1-http2.rs 331ms 74ms 24.4MB 653ms 137ms rustc 1.98.1
rust 2-http2.rs 556ms 55ms 30.7MB 1503ms 173ms rustc 1.98.1
kotlin 2-m.kt 3791ms 276ms 249.0MB 11797ms 810ms kotlin/jvm 21.0.12
kotlin 1-m.kt 3917ms 180ms 275.4MB 12153ms 857ms kotlin/jvm 21.0.12

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 38ms 0.7ms 7.9MB 27ms 0ms rustc 1.98.1
rust 5-i.rs 46ms 2.0ms 10.1MB 30ms 3ms rustc 1.98.1
rust 2.rs 76ms 0.4ms 33.8MB 57ms 3ms rustc 1.98.1
rust 3.rs 77ms 2.6ms 32.1MB 53ms 7ms rustc 1.98.1
rust 1.rs 114ms 0.6ms 68.3MB 80ms 20ms rustc 1.98.1
kotlin 1-m.kt 1371ms 105ms 176.1MB 3830ms 140ms kotlin/jvm 21.0.12

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-i.rs 234ms 9.0ms 54.1MB 207ms 13ms rustc 1.98.1
rust 4-i.rs 298ms 3.6ms 54.8MB 243ms 37ms rustc 1.98.1
rust 3.rs 417ms 2.9ms 239.2MB 343ms 60ms rustc 1.98.1
rust 2.rs 422ms 2.7ms 239.2MB 350ms 53ms rustc 1.98.1
rust 1.rs 697ms 6.0ms 551.3MB 507ms 177ms rustc 1.98.1
kotlin 1-m.kt 3079ms 117ms 749.4MB 7240ms 250ms kotlin/jvm 21.0.12

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 44ms 3.1ms 1.1MB 33ms 0ms rustc 1.98.1
rust 1.rs 70ms 7.9ms 1.1MB 60ms 0ms rustc 1.98.1
kotlin 1-m.kt 284ms 4.7ms 95.4MB 503ms 33ms kotlin/jvm 21.0.12
kotlin 2-m.kt 389ms 13ms 99.5MB 863ms 27ms kotlin/jvm 21.0.12

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 202ms 23ms 1.1MB 193ms 0ms rustc 1.98.1
rust 1.rs 280ms 31ms 1.1MB 270ms 0ms rustc 1.98.1
kotlin 1-m.kt 482ms 4.8ms 201.4MB 717ms 47ms kotlin/jvm 21.0.12
kotlin 2-m.kt 543ms 5.7ms 209.8MB 993ms 67ms kotlin/jvm 21.0.12

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 28ms 0.2ms 1.2MB 20ms 0ms rustc 1.98.1
rust 1.rs 46ms 2.5ms 1.1MB 37ms 0ms rustc 1.98.1
kotlin 1-m.kt 255ms 1.9ms 91.1MB 500ms 37ms kotlin/jvm 21.0.12
kotlin 2-m.kt 302ms 15ms 95.4MB 693ms 23ms kotlin/jvm 21.0.12

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 641ms 8.2ms 676.7MB 820ms 93ms kotlin/jvm 21.0.12
rust 1.rs 1084ms 8.3ms 33.8MB 1060ms 10ms rustc 1.98.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 212ms 3.5ms 9.8MB 197ms 0ms rustc 1.98.1
kotlin 1-m.kt 250ms 11ms 205.0MB 363ms 67ms kotlin/jvm 21.0.12

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 221ms 1.1ms 1.1MB 210ms 0ms rustc 1.98.1
rust 7-i.rs 333ms 4.8ms 1.1MB 320ms 0ms rustc 1.98.1
rust 1.rs 361ms 3.0ms 1.1MB 350ms 0ms rustc 1.98.1
rust 2.rs 484ms 2.9ms 1.1MB 473ms 0ms rustc 1.98.1
kotlin 1.kt 884ms 6.3ms 49.9MB 980ms 17ms kotlin/jvm 21.0.12

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 24ms 0.3ms 1.1MB 17ms 0ms rustc 1.98.1
rust 7-i.rs 36ms 0.4ms 1.1MB 23ms 0ms rustc 1.98.1
rust 1.rs 39ms 0.7ms 1.1MB 30ms 0ms rustc 1.98.1
rust 2.rs 52ms 0.8ms 1.1MB 43ms 0ms rustc 1.98.1
kotlin 1-m.kt 208ms 14ms 49.7MB 297ms 17ms kotlin/jvm 21.0.12

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 2.rs 2314ms 44ms 2.8MB 2230ms 70ms rustc 1.98.1
kotlin 1.kt 5427ms 177ms 419.0MB 6873ms 170ms kotlin/jvm 21.0.12
rust 1.rs 10361ms 53ms 3.3MB 8747ms 1587ms rustc 1.98.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 2.rs 506ms 4.3ms 2.5MB 493ms 0ms rustc 1.98.1
kotlin 1-m.kt 1629ms 66ms 362.2MB 3007ms 117ms kotlin/jvm 21.0.12
rust 1.rs 1997ms 8.8ms 2.8MB 1823ms 157ms rustc 1.98.1

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 594ms 1.7ms 80.5MB 683ms 7ms rustc 1.98.1
kotlin 1.kt 8673ms 241ms 178.9MB 9617ms 70ms kotlin/jvm 21.0.12

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 69ms 1.7ms 11.0MB 63ms 0ms rustc 1.98.1
kotlin 1-m.kt 1293ms 57ms 133.7MB 2110ms 47ms kotlin/jvm 21.0.12

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 177ms 4.7ms 1.1MB 167ms 0ms rustc 1.98.1
rust 1.rs 2238ms 23ms 1.1MB 2223ms 0ms rustc 1.98.1
kotlin 1.kt 5266ms 83ms 228.7MB 6800ms 87ms kotlin/jvm 21.0.12

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 46ms 1.1ms 1.1MB 37ms 0ms rustc 1.98.1
rust 1.rs 562ms 1.3ms 1.1MB 550ms 0ms rustc 1.98.1
kotlin 1-m.kt 1750ms 44ms 260.1MB 2960ms 50ms kotlin/jvm 21.0.12