Benchmarks - aaronriekenberg/rust-parallel GitHub Wiki

Test System

• 15-inch Macbook Air M2, 2023 (my personal laptop)
• rust-parallel uses 8 parallel jobs by default on this machine
• MacOS 26.3

Test Setup

• Run echo on 1000 strings 1 to 1000
• Benchmarks run using hyperfine testing tool
• Link to benchmark script

Summary

• rust-parallel is 9.88 times faster than GNU parallel
• rust-parallel is 2.09 times faster than xargs with 8 processes. Note that this use of xargs does not prevent output interleaving.

Versions

$ rust-parallel -V
rust-parallel 1.22.0

$ parallel -V
GNU parallel 20260222

Results

Benchmark 1: seq 1 1000 | rust-parallel echo
  Time (mean ± σ):     232.1 ms ±   2.0 ms    [User: 592.2 ms, System: 882.1 ms]
  Range (min … max):   228.0 ms … 234.1 ms    12 runs

Benchmark 2: seq 1 1000 | xargs -P8 -L1 echo
  Time (mean ± σ):     484.7 ms ±   8.0 ms    [User: 439.0 ms, System: 855.6 ms]
  Range (min … max):   475.4 ms … 504.9 ms    10 runs

Benchmark 3: seq 1 1000 | parallel echo
  Time (mean ± σ):      2.293 s ±  0.017 s    [User: 3.036 s, System: 3.891 s]
  Range (min … max):    2.262 s …  2.329 s    10 runs

Summary
  seq 1 1000 | rust-parallel echo ran
    2.09 ± 0.04 times faster than seq 1 1000 | xargs -P8 -L1 echo
    9.88 ± 0.11 times faster than seq 1 1000 | parallel echo