go-re2 VS go-pcre

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;

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;

If you want faster performance at the cost of potentially decreased safety, look at the fast-performing go examples in the benchmark I linked which bind to `libpcre`. Like this or this.