On Mon, Sep 21, 2020 at 03:12:13AM -0400, Avery Tarasov wrote: > I'm looking to optimize PCRE2 10.35 for speed as much as possible on my GCC > 10.2/MingW setup. I know the default PCRE2 flag uses O2, and I have used > Ofast before without issue, but I don't know how safe it really is. I > searched Google and couldn't find and documentation about the > safety/feasibility of alternative optimization levels with PCRE2. Is Ofast > completely safe? If not, what about O3? If either are not safe what are > the specific risks/etc? > > Thanks so much for any feedback / suggestions!! > I think you should rather ask GCC developers, since your question is not specific to PCRE2. For the beginning, find out the options in GCC manual page. There is a short description.
-- Petr
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