Tips on making regex more performant?

[Dmitry Olshansky]

19-Jun-2013 00:34, Jacob Carlborg пишет:
> On 2013-06-18 21:22, Gary Willoughby wrote:
>
>> Thanks. Hmmm.. i get 500K (worse performance) using that. :/
>
> D has basically the fastest regular expression library/module. It's
> faster than V8.
>

As much as I'm appeased to hear this it's isn't simply "faster then V8". 
V8 one is very fast in general case (JIT compiler aids in that) and I 
think would come out as winer more often then std.regex.

What is closer to truth is that typically std.regex is within about 5 
top well-known engines and it's beats the rest of competition on some 
patterns including in certain popular benchmarks such as regex-dna.

For instance it typically obliterates PCRE, infinitely so on Unicode 
patterns (I never had patience to let it finish) .

With that being said there are many things to improve in std.regex 
speed-wise, sadly I haven't been able to tell about it at DConf.


-- 
Dmitry Olshansky