Re: Very promising results with libpcre2

From: Junio C Hamano <gitster@pobox.com>
Date: Mar 31, 2017, 22:48 UTC
Message-ID: <xmqqtw69vz9t.fsf@gitster.mtv.corp.google.com>
In-Reply-To: <CACBZZX6FcHcY7cYs6s_pv=E43cHNmzyUY5wrcuhPWWmUixCL+g@mail.gmail.com>

Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:

Show 6 quoted lines

> That enables the new JIT support in pcre v2:
>
>       s/iter    rx fixed   prx
> rx      2.19    --  -33%  -44%
> fixed   1.47   49%    --  -17%
> prx     1.22   79%   20%    --

The numbers with JIT does look "interesting".

I couldn't quite tell if there are major incompatibilities in the regex language itself between two versions from their documentation, but assuming that there isn't (modulo bugfixes and enhancements) and assuming that we are going to use their standard matcher, it may be OK to just use the newer one without linking both.