Hi, thanks for sharing these improvements!
On 20 October 2013 17:35, Zoltán Herczeg <[email protected]> wrote: > Hi all, > > Now it can even replace \s* to \s*+ in /\s*(?:left|right)?hand/. > That is, it can detect that anything coming after the \s* won't include a \s, so it can possessify the quantifier? > Back to the results, then. Once I got a pattern set used by an Intrusion > Detection System, and I use it for benchmarking and also getting ideas how > people use regular expressions. Sometimes I browse http://regexlib.com/ as > well. I realized that most patterns are not exactly efficient, so regex > compiler optimizations such as auto-possessifying seems very important. The > gain provided by this particular optimization is the following (INT: > interpreter, JIT: PCRE-JIT compiler, s: seconds): > > was: INT: 412.16 s, JIT: 86.22 s > now: INT: 182.94 s, JIT: 45.46 s > progress: INT: 125% JIT: 90% > > Of course on other pattern sets the results might be totally different, but > we hope this helps to improve the overall performance of our favourite regex > engine. "Impressive, most impressive" :) Are we going to see these optimizations as part of PCRE 9 (together with the new API) or do you plan to roll them in the 8.xx series too? Thanks again for your work, -- Giuseppe D'Angelo -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
