Programming Language and compiler
Benchmarks

Swift VS Zig benchmarks

Current benchmark data was generated on Mon Apr 14 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
zig 1.zig 1894ms 41ms 49.0MB 1867ms 17ms zig 0.14.0
swift 1.swift 2675ms 16ms 53.8MB 2643ms 20ms swift 6.1.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 152ms 2.5ms 7.0MB 140ms 0ms zig 0.14.0
swift 1.swift 239ms 3.9ms 11.8MB 227ms 0ms swift 6.1.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 631ms 8.0ms 1.4MB 2400ms 0ms zig 0.14.0
zig 3-i.zig 1768ms 2.0ms 1.0MB 1760ms 0ms zig 0.14.0
swift 1.swift 2491ms 11ms 5.5MB 2480ms 0ms swift 6.1.0
zig 1.zig 2714ms 7.8ms 1.1MB 2707ms 0ms zig 0.14.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 60ms 1.2ms 1.4MB 200ms 0ms zig 0.14.0
zig 3-i.zig 148ms 1.0ms 1.0MB 140ms 0ms zig 0.14.0
swift 1.swift 213ms 3.7ms 6.3MB 203ms 0ms swift 6.1.0
zig 1.zig 229ms 0.7ms 1.0MB 220ms 0ms zig 0.14.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 87ms 0.7ms 1.0MB 80ms 0ms zig 0.14.0
swift 3-m.swift 146ms 0.8ms 20.8MB 433ms 0ms swift 6.1.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 11ms 0.8ms 1.0MB 0ms 0ms zig 0.14.0
swift 3.swift 38ms 0.4ms 18.2MB 37ms 0ms swift 6.1.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1.0ms 0.0ms 1.0MB 0ms 0ms zig 0.14.0
swift 1.swift 2.3ms 0.2ms 5.8MB 0ms 0ms swift 6.1.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 338ms 12ms 65.3MB 910ms 23ms zig 0.14.0
zig 1.zig 506ms 2.3ms 26.2MB 487ms 7ms zig 0.14.0
swift 2-m.swift 1336ms 17ms 70.7MB 4880ms 30ms swift 6.1.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 66ms 2.0ms 54.3MB 140ms 27ms zig 0.14.0
zig 1.zig 67ms 2.4ms 15.3MB 53ms 0ms zig 0.14.0
swift 2-m.swift 248ms 2.1ms 60.0MB 663ms 23ms swift 6.1.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 198ms 0.4ms 1.0MB 190ms 0ms zig 0.14.0
zig 2.zig 280ms 0.3ms 1.0MB 270ms 0ms zig 0.14.0
zig 1.zig 315ms 0.5ms 1.1MB 307ms 0ms zig 0.14.0
swift 7.swift 344ms 2.0ms 10.0MB 330ms 0ms swift 6.1.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 22ms 0.2ms 1.0MB 10ms 0ms zig 0.14.0
zig 2.zig 30ms 0.1ms 1.0MB 20ms 0ms zig 0.14.0
zig 1.zig 34ms 0.4ms 1.1MB 30ms 0ms zig 0.14.0
swift 7.swift 39ms 0.2ms 10.0MB 30ms 0ms swift 6.1.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 2458ms 14ms 2.2MB 2430ms 13ms zig 0.14.0
swift 1.swift timeout 0.0ms 7.1MB 4937ms 50ms swift 6.1.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 568ms 5.0ms 1.8MB 557ms 0ms zig 0.14.0
swift 1.swift 1928ms 4.2ms 7.0MB 1913ms 0ms swift 6.1.0