Best regexp alternative for Go. Benchmarks. Plots.

1. go-re2

   1 1 150 8.6 Go

   Drop-in replacement for regexp using re2, for any Go app

   

   go-re2 (1.3.0) - as simple as possible replaces the default regexp. Uses C++ re2 to improve performance when dealing with large inputs or complex expressions;

2. CodeRabbit

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3. regexp2

   2 4 1,066 4.2 Go

   A full-featured regex engine in pure Go based on the .NET engine

   

   regexp2 (1.10.0) - a feature-rich regexp engine for Go. It does not have runtime guarantees like the built-in regexp package, but is compatible with Perl5 and .NET;

4. go-pcre

   3 2 57 2.7 Go

   Perl Compatible Regular Expression for Go

   

   go-pcre (1.0.0) - provides support for Perl compatible regular expressions using libpcre or libpcre++. JIT compilation is available, making this fork much faster than its counterparts. On the downside, you'll need the libpcre3-dev dependency;

5. rure-go

   4 2 253 3.0 Go

   Go bindings to Rust's regex engine.

   

   rure-go (regex 1.9.3) - uses the Rust regex engine with CGo bindings. The downside is a Rust library dependency that needs to be compiled;

6. gohs

   5 1 286 7.0 Go

   GoLang Binding of HyperScan https://www.hyperscan.io/

   

   gohs (1.2.2 + hs5.4.1) - regex engine designed for high performance. It is implemented as a library that provides a simple C-API. It also requires compilation and linking of third-party dependencies;

7. go-yara

   6 1 366 5.3 Go

   Go bindings for YARA

   

   go-yara - A tool for identifying and classifying malware samples. Although YARA has functionality for templating and regular expressions, it is very limited, so I will not include this library in the upcoming tests.

8. regex-benchmark

   7 10 319 0.0 Dockerfile

   It's just a simple regex benchmark of different programming languages.

   

   Before we start comparing the aforementioned solutions, it is worth to show how bad things are with the standard regex library in Go. I found the project where the author compares the performance of standard regex engines of various languages. The point of this benchmark is to repeatedly run 3 regular expressions over a predefined text. Go came in 3rd place in this benchmark! From the end....

9. InfluxDB

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10. regexcmp

    8 1 3 4.9 Go

    A tool to compare different regexp libraries in Go

    

    To answer these questions, I wrote a small benchmarking program that can be used to compare different regex engines in terms of speed and memory usage. If you want to test it yourself or evaluate the correctness of the used methods, here is the code.

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