[squid-users] Regex optimization

[Alfredo Rezinovsky]

Not my question. I'm asking about performance

2016-04-27 9:09 GMT-03:00 Yuri Voinov <yvoinov at gmail.com>:

> https://regex101.com is your best friend.
>
> 27.04.16 17:32, Alfredo Rezinovsky пишет:
>
> I saw in debug log that when an ACL has many regexes each one is compared
> sequentially.
>
> If I have
>
> www.facebook.com
> facebook.com
> www.google.com
> google.com
>
> If will be faster to check just ONE optimized regex like
> (www\.)?(facebook|google).com than the previous three?
>
> I'm really talking about optimizing about 3000 url regexes in one huge
> regex because comparing each and every url to 3000 regexes is too slow.
>
> I know using
> (www\.facebook\.com)|(facebook\.com)|(www\.google\.com)|(google\.com) with
> PCRE will produce the same optimized result as
> (www\.)?(facebook|google)\.com. Squid uses GnuRegex. Does GNURegex lib
> optimizes this as well ?
>
>
>


-- 
Alfrenovsky
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