Programming Language and compiler
Benchmarks

Python VS Nim benchmarks

Current benchmark data was generated on Sun Jul 13 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
nim 2.nim 786ms 11ms 34.9MB 770ms 3ms nim 2.2.4
nim 2.nim 947ms 6.3ms 35.2MB 923ms 10ms nim/clang 2.2.4
python 1.py 1162ms 7.5ms 96.8MB 1097ms 47ms pypy 3.11.13
python 1.py timeout 0.0ms 41.0MB 4973ms 10ms cpython 3.13.5
python 1.py timeout 0.0ms 40.5MB 4743ms 240ms pyston 3.8.12

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 73ms 0.2ms 5.5MB 60ms 0ms nim 2.2.4
nim 2.nim 93ms 1.5ms 5.8MB 80ms 0ms nim/clang 2.2.4
python 1.py 94ms 1.5ms 68.2MB 67ms 13ms pypy 3.11.13
python 1.py 478ms 3.6ms 11.9MB 457ms 10ms pyston 3.8.12
python 1.py 727ms 3.3ms 12.9MB 717ms 0ms cpython 3.13.5

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 1241ms 47ms 104.7MB 1190ms 33ms pypy 3.11.13
python 1.py 2671ms 7.4ms 25.4MB 2650ms 10ms cpython 3.13.5
nim 1.nim timeout 0.0ms 574.4MB 2647ms 1873ms nim 2.2.4
nim 3.nim timeout 0.0ms 6.6MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 574.8MB 2590ms 1930ms nim/clang 2.2.4
nim 3.nim timeout 0.0ms 6.9MB 4983ms 0ms nim/clang 2.2.4
python 1.py timeout 0.0ms 17.4MB 4980ms 7ms pyston 3.8.12

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 223ms 2.2ms 85.2MB 187ms 23ms pypy 3.11.13
python 1.py 228ms 1.3ms 20.6MB 203ms 10ms cpython 3.13.5
python 1.py 660ms 16ms 16.8MB 643ms 0ms pyston 3.8.12
nim 3.nim 903ms 4.5ms 4.0MB 893ms 0ms nim/clang 2.2.4
nim 3.nim 905ms 4.9ms 3.6MB 893ms 0ms nim 2.2.4
nim 1.nim 4097ms 6.6ms 518.7MB 2123ms 1547ms nim/clang 2.2.4
nim 1.nim 4111ms 9.9ms 518.2MB 2133ms 1553ms nim 2.2.4

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 266ms 3.3ms 84.9MB 227ms 20ms pypy 3.11.13
python 1.py 362ms 3.7ms 12.6MB 347ms 0ms cpython 3.13.5
python 1.py 2007ms 3.9ms 9.6MB 1993ms 0ms pyston 3.8.12

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 113ms 2.9ms 65.3MB 87ms 13ms pypy 3.11.13
python 1.py 134ms 46ms 12.3MB 100ms 0ms cpython 3.13.5
python 1.py 349ms 2.6ms 8.8MB 340ms 0ms pyston 3.8.12

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 188ms 2.6ms 1.5MB 177ms 0ms nim 2.2.4
nim 2.nim 243ms 2.2ms 1.8MB 233ms 0ms nim/clang 2.2.4
nim 1.nim 537ms 2.6ms 1.8MB 447ms 73ms nim/clang 2.2.4
nim 1.nim 560ms 2.7ms 1.5MB 470ms 73ms nim 2.2.4
python 1.py 2206ms 28ms 89.1MB 2163ms 33ms pypy 3.11.13
python 5-m.py 2331ms 44ms 66.1MB 3597ms 827ms pypy 3.11.13
python 5-m.py 2434ms 24ms 12.5MB 3547ms 953ms pyston 3.8.12
python 1.py 3030ms 35ms 8.1MB 3013ms 0ms pyston 3.8.12
python 5-m.py 3359ms 19ms 13.8MB 4437ms 910ms cpython 3.13.5
python 1.py 4658ms 45ms 9.0MB 4647ms 0ms cpython 3.13.5

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 21ms 0.8ms 1.5MB 10ms 0ms nim 2.2.4
nim 2.nim 27ms 1.0ms 1.8MB 20ms 0ms nim/clang 2.2.4
nim 1.nim 57ms 0.9ms 1.8MB 40ms 0ms nim/clang 2.2.4
nim 1.nim 59ms 0.7ms 1.5MB 47ms 0ms nim 2.2.4
python 1.py 279ms 5.1ms 63.3MB 253ms 10ms pypy 3.11.13
python 5-m.py 310ms 3.6ms 12.5MB 397ms 147ms pyston 3.8.12
python 1.py 314ms 1.1ms 8.1MB 300ms 0ms pyston 3.8.12
python 5-m.py 393ms 1.0ms 13.8MB 473ms 127ms cpython 3.13.5
python 5-m.py 449ms 2.7ms 66.2MB 743ms 297ms pypy 3.11.13
python 1.py 486ms 1.2ms 9.0MB 473ms 0ms cpython 3.13.5

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.0ms 0.0ms 1.6MB 0ms 0ms nim 2.2.4
nim 1.nim 1.1ms 0.0ms 1.8MB 0ms 0ms nim/clang 2.2.4
python 1.py 12ms 0.8ms 7.6MB 0ms 0ms pyston 3.8.12
python 1.py 14ms 1.2ms 8.8MB 10ms 0ms cpython 3.13.5
python 1.py 30ms 0.8ms 52.3MB 10ms 10ms pypy 3.11.13

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 2132ms 36ms 26.6MB 1080ms 1440ms pyston 3.8.12
python 1.py 2538ms 364ms 27.6MB 1573ms 1443ms cpython 3.13.5
python 1.py 4714ms 375ms 102.2MB 3087ms 1100ms pypy 3.11.13

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 1088ms 2.8ms 21.3MB 237ms 253ms pyston 3.8.12
python 1.py 1193ms 73ms 22.9MB 313ms 247ms cpython 3.13.5
python 1.py 1730ms 340ms 87.1MB 750ms 210ms pypy 3.11.13

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 201ms 0.9ms 38.1MB 167ms 23ms pyston 3.8.12
python 1.py 217ms 2.1ms 38.7MB 193ms 10ms cpython 3.13.5
python 1.py 451ms 4.1ms 109.3MB 403ms 37ms pypy 3.11.13

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 1831ms 9.9ms 220.5MB 1663ms 157ms pyston 3.8.12
python 1.py 1931ms 9.0ms 222.0MB 1827ms 90ms cpython 3.13.5
python 1.py 3242ms 13ms 365.1MB 3083ms 140ms pypy 3.11.13

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 3-m.py 2341ms 4.1ms 136.0MB 7903ms 333ms pypy 3.11.13
python 3-m.py 3129ms 44ms 34.2MB 11863ms 123ms pyston 3.8.12
python 3.py timeout 0.0ms 35.8MB 90ms 20ms cpython 3.13.5

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 3-m.py 390ms 0.6ms 76.7MB 980ms 150ms pypy 3.11.13
python 3-m.py 395ms 4.5ms 14.3MB 1297ms 80ms pyston 3.8.12
python 3-m.py 660ms 11ms 15.2MB 2320ms 67ms cpython 3.13.5

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 112ms 1.7ms 1.6MB 103ms 0ms nim/clang 2.2.4
nim 2.nim 114ms 2.9ms 1.4MB 110ms 0ms nim 2.2.4
python 2.py 154ms 2.4ms 58.9MB 130ms 10ms pypy 3.11.13
python 1.py 187ms 3.8ms 59.8MB 160ms 10ms pypy 3.11.13
python 1.py 730ms 3.4ms 8.9MB 720ms 0ms pyston 3.8.12
python 2.py 845ms 19ms 8.5MB 833ms 0ms pyston 3.8.12
python 1.py 1136ms 8.0ms 9.5MB 1123ms 0ms cpython 3.13.5
python 2.py 1323ms 19ms 9.3MB 1310ms 0ms cpython 3.13.5
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
nim 2.nim 324ms 2.4ms 1.9MB 317ms 0ms nim/clang 2.2.4
nim 2.nim 338ms 4.4ms 1.4MB 330ms 0ms nim 2.2.4
python 2.py 361ms 2.1ms 59.7MB 330ms 10ms pypy 3.11.13
python 1.py 401ms 4.8ms 60.9MB 377ms 13ms pypy 3.11.13
python 1.py 2157ms 16ms 8.9MB 2143ms 0ms pyston 3.8.12
python 2.py 2513ms 23ms 8.5MB 2503ms 0ms pyston 3.8.12
python 1.py 3335ms 53ms 9.5MB 3320ms 0ms cpython 3.13.5
python 2.py 3942ms 29ms 9.3MB 3930ms 0ms cpython 3.13.5
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 48ms 0.2ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 51ms 1.6ms 1.3MB 40ms 0ms nim 2.2.4
python 2.py 109ms 3.1ms 58.1MB 87ms 10ms pypy 3.11.13
python 1.py 124ms 3.2ms 59.4MB 103ms 10ms pypy 3.11.13
python 1.py 361ms 6.0ms 8.5MB 347ms 0ms pyston 3.8.12
python 2.py 388ms 3.0ms 8.1MB 377ms 0ms pyston 3.8.12
nim 1.nim 476ms 2.4ms 1.3MB 467ms 0ms nim 2.2.4
nim 1.nim 479ms 9.7ms 1.5MB 470ms 0ms nim/clang 2.2.4
python 1.py 534ms 6.3ms 9.3MB 523ms 0ms cpython 3.13.5
python 2.py 638ms 7.1ms 8.9MB 627ms 0ms cpython 3.13.5

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 547ms 6.1ms 33.9MB 527ms 3ms nim 2.2.4
nim 1.nim 645ms 20ms 34.7MB 623ms 7ms nim/clang 2.2.4
python 1.py 2184ms 9.5ms 204.9MB 2073ms 97ms pypy 3.11.13
python 1.py timeout 0.0ms 94.1MB 4960ms 27ms cpython 3.13.5
python 1.py timeout 0.0ms 130.4MB 4940ms 47ms pyston 3.8.12

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 116ms 3.2ms 9.6MB 103ms 0ms nim 2.2.4
nim 1.nim 136ms 5.6ms 9.9MB 123ms 0ms nim/clang 2.2.4
python 1.py 378ms 3.7ms 105.2MB 320ms 47ms pypy 3.11.13
python 1.py 2994ms 19ms 37.4MB 2970ms 10ms cpython 3.13.5
python 1.py timeout 0.0ms 48.9MB 4943ms 43ms pyston 3.8.12

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 343ms 3.6ms 2.0MB 337ms 0ms nim/clang 2.2.4
python 2.py 1348ms 4.2ms 60.6MB 1320ms 10ms pypy 3.11.13
python 1.py 2705ms 69ms 57.8MB 2677ms 13ms pypy 3.11.13
python 1.py timeout 0.0ms 8.9MB 4990ms 0ms cpython 3.13.5
python 2.py timeout 0.0ms 9.0MB 4990ms 0ms cpython 3.13.5
python 1.py timeout 0.0ms 8.3MB 4990ms 0ms pyston 3.8.12
python 2.py timeout 0.0ms 8.1MB 4990ms 0ms pyston 3.8.12

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 35ms 0.8ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 36ms 0.6ms 2.0MB 30ms 0ms nim/clang 2.2.4
python 2.py 178ms 3.3ms 58.3MB 153ms 10ms pypy 3.11.13
python 1.py 309ms 4.0ms 57.8MB 287ms 10ms pypy 3.11.13
python 1.py 936ms 11ms 8.3MB 927ms 0ms pyston 3.8.12
python 2.py 1312ms 18ms 8.3MB 1300ms 0ms pyston 3.8.12
python 1.py 2893ms 26ms 8.9MB 2883ms 0ms cpython 3.13.5
python 2.py 3043ms 14ms 9.0MB 3030ms 0ms cpython 3.13.5

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 271ms 4.0ms 41.5MB 263ms 0ms nim 2.2.4
nim 1.nim 322ms 6.8ms 41.8MB 313ms 0ms nim/clang 2.2.4
python 1.py 2498ms 18ms 369.9MB 2430ms 53ms pypy 3.11.13
python 2.py 2971ms 13ms 632.9MB 2787ms 167ms pyston 3.8.12
python 1.py 4747ms 19ms 320.5MB 4687ms 47ms pyston 3.8.12
python 1.py timeout 0.0ms 321.4MB 4960ms 23ms cpython 3.13.5
python 2.py timeout 0.0ms 633.8MB 4823ms 163ms cpython 3.13.5
python 2.py timeout 0.0ms 1017.5MB 4707ms 280ms pypy 3.11.13

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 52ms 2.4ms 11.5MB 43ms 0ms nim 2.2.4
nim 1.nim 66ms 4.2ms 11.8MB 57ms 0ms nim/clang 2.2.4
python 1.py 525ms 4.9ms 135.5MB 487ms 20ms pypy 3.11.13
python 2.py 721ms 2.3ms 164.2MB 670ms 33ms pyston 3.8.12
python 1.py 1066ms 26ms 86.0MB 1043ms 10ms pyston 3.8.12
python 2.py 1385ms 12ms 290.8MB 1297ms 73ms pypy 3.11.13
python 2.py 1398ms 5.5ms 165.1MB 1353ms 30ms cpython 3.13.5
python 1.py 2846ms 21ms 87.0MB 2817ms 10ms cpython 3.13.5

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 4.py 1921ms 13ms 8.9MB 1873ms 33ms pyston 3.8.12
python 4.py 1974ms 0.7ms 9.5MB 1920ms 40ms cpython 3.13.5
python 4.py 2156ms 3.3ms 89.6MB 2117ms 27ms pypy 3.11.13

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 4.py 454ms 1.7ms 8.6MB 440ms 0ms pyston 3.8.12
python 4.py 470ms 3.8ms 9.4MB 457ms 0ms cpython 3.13.5
python 4.py 541ms 4.5ms 83.8MB 503ms 23ms pypy 3.11.13

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1646ms 10ms 152.3MB 1613ms 20ms nim/clang 2.2.4
nim 1.nim 1673ms 4.5ms 151.5MB 1643ms 13ms nim 2.2.4
python 1.py 2245ms 6.4ms 244.7MB 2187ms 43ms pypy 3.11.13
python 1.py 4731ms 10ms 226.2MB 4540ms 177ms pyston 3.8.12
python 1.py timeout 0.0ms 145.6MB 4930ms 57ms cpython 3.13.5

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 173ms 2.5ms 17.5MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 177ms 0.6ms 17.4MB 160ms 0ms nim 2.2.4
python 1.py 339ms 7.7ms 86.8MB 293ms 30ms pypy 3.11.13
python 1.py 498ms 2.4ms 30.5MB 463ms 17ms pyston 3.8.12
python 1.py 613ms 2.2ms 29.7MB 583ms 17ms cpython 3.13.5

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 3177ms 13ms 8.3MB 3163ms 0ms pyston 3.8.12
python 1.py 3587ms 25ms 75.4MB 3547ms 27ms pypy 3.11.13
python 1.py 3805ms 16ms 8.9MB 3790ms 0ms cpython 3.13.5

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 802ms 4.0ms 8.3MB 793ms 0ms pyston 3.8.12
python 1.py 961ms 8.5ms 8.9MB 950ms 0ms cpython 3.13.5
python 1.py 996ms 3.5ms 68.6MB 963ms 17ms pypy 3.11.13

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 3589ms 2.6ms 1.6MB 3580ms 0ms nim/clang 2.2.4
nim 1.nim 3610ms 3.4ms 1.4MB 3600ms 0ms nim 2.2.4
python 8.py timeout 0.0ms 14.8MB 33ms 10ms cpython 3.13.5
python 8.py timeout 0.0ms 94.7MB 680ms 60ms pypy 3.11.13
python 8.py timeout 0.0ms 14.2MB 33ms 13ms pyston 3.8.12

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 899ms 0.6ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 904ms 3.3ms 1.3MB 893ms 0ms nim 2.2.4
python 8.py timeout 0.0ms 14.5MB 43ms 10ms cpython 3.13.5
python 8.py timeout 0.0ms 97.8MB 1170ms 147ms pypy 3.11.13
python 8.py timeout 0.0ms 13.6MB 57ms 20ms pyston 3.8.12

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 226ms 0.2ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 228ms 1.1ms 1.3MB 220ms 0ms nim 2.2.4
python 8-m.py 2134ms 4.9ms 94.1MB 7090ms 240ms pypy 3.11.13
python 8.py timeout 0.0ms 14.0MB 87ms 17ms cpython 3.13.5
python 8.py timeout 0.0ms 13.2MB 133ms 33ms pyston 3.8.12