Programming Language and compiler
Benchmarks

Swift VS Nim benchmarks

Current benchmark data was generated on Sun Jun 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
nim 2.nim 779ms 1.2ms 34.4MB 760ms 3ms nim 2.2.4
nim 2.nim 963ms 9.3ms 35.2MB 940ms 10ms nim/clang 2.2.4
swift 1.swift 2555ms 26ms 53.8MB 2523ms 20ms swift 6.1.2

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 75ms 4.0ms 5.5MB 63ms 0ms nim 2.2.4
nim 2.nim 91ms 2.7ms 5.8MB 80ms 0ms nim/clang 2.2.4
swift 1.swift 232ms 3.0ms 11.9MB 220ms 0ms swift 6.1.2

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2480ms 2.8ms 5.5MB 2470ms 0ms swift 6.1.2

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 214ms 2.6ms 5.5MB 207ms 0ms swift 6.1.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 146ms 1.6ms 21.0MB 433ms 3ms swift 6.1.2
nim 2.nim 189ms 1.2ms 1.5MB 180ms 0ms nim 2.2.4
nim 2.nim 241ms 2.6ms 1.8MB 230ms 0ms nim/clang 2.2.4
nim 1.nim 535ms 1.0ms 1.8MB 430ms 90ms nim/clang 2.2.4
nim 1.nim 558ms 2.5ms 1.5MB 473ms 67ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 22ms 0.1ms 1.5MB 13ms 0ms nim 2.2.4
nim 2.nim 27ms 1.0ms 1.8MB 20ms 0ms nim/clang 2.2.4
swift 3.swift 38ms 0.4ms 14.4MB 33ms 0ms swift 6.1.2
nim 1.nim 57ms 0.5ms 1.8MB 40ms 3ms nim/clang 2.2.4
nim 1.nim 57ms 0.2ms 1.5MB 40ms 3ms nim 2.2.4

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 0.9ms 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
swift 1.swift 2.4ms 0.2ms 5.9MB 0ms 0ms swift 6.1.2

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 2-m.swift 1326ms 10ms 74.3MB 4847ms 33ms swift 6.1.2

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 2-m.swift 249ms 1.6ms 60.1MB 660ms 27ms swift 6.1.2

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 318ms 0.5ms 1.8MB 310ms 0ms nim 2.2.4
swift 7.swift 343ms 1.2ms 10.1MB 333ms 0ms swift 6.1.2
nim 2.nim 344ms 2.8ms 2.0MB 337ms 0ms nim/clang 2.2.4

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 34ms 0.6ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 37ms 1.1ms 2.0MB 30ms 0ms nim/clang 2.2.4
swift 7.swift 39ms 1.3ms 10.3MB 30ms 0ms swift 6.1.2

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift timeout 0.0ms 7.1MB 4920ms 67ms swift 6.1.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 1831ms 3.2ms 7.0MB 1813ms 0ms swift 6.1.2