Playing with counting word frequencies (and the performance thereof) in various languages. See the full article for context and background: https://benhoyt.com/writings/count-words/

To run the tests and benchmarks (you'll need Go, Rust, Python 3, AWK and perhaps other tools installed). Only tested on Linux:

./test.sh
./benchmark.py

For the latest results (run on my machine against these versions), see the article's performance results section.

Thanks to these contributors for additional language versions:

• Bash: Jesse Hathaway - not included in benchmarks as it takes over 2 minutes
• C#: John Taylor, Yuriy Ostapenko and Osman Turan
• C# (LINQ): Osman Turan - not run in benchmarks
• C++ optimized version: Jussi Pakkanen, Adev, Nathan Myers
• Common Lisp: Brad Svercl
• Crystal: Andrea Manzini
• D: Ross Lonstein
• F#: Yuriy Ostapenko
• Go: Miguel Angel - simplifying the Go optimized version; Joshua Corbin - adding a parallel Go version for demonstration
• Java: Iulian Pleșoianu
• JavaScript: Dani Biró and Flo Hinze
• Julia: Alessandro Melis
• Kotlin: Kazik Pogoda
• Lua: Flemming Madsen
• Nim: csterritt and euantorano
• OCaml: doesntgolf
• Perl: Charles Randall
• PHP: Max Semenik
• Ruby: Bill Mill, with input from Niklas
• Rust: Andrew Gallant
• Swift: Daniel Müllenborn
• Tcl: William Ross
• Zig: ifreund and matu3ba and ansingh

See other versions on Rosetta Code.