Regex matching cause lots of _d_arrayliteralTX calls

[JR]

On Thursday, 26 September 2013 at 23:04:22 UTC, bearophile wrote:
> I am not sure how a IRC bot could consume more than a tiny 
> fraction of the CPU time of a modern multi-GHz processor.

Nor does it bite into my 8 gigabytes of ram.

Forgive me, but the main culprit in all of this is still me doing 
it wrong. Can I keep the same RegexMatcher (perhaps as a struct 
member) and reuse it between matchings?

> And I am not sure if regular expressions are a good idea to 
> implement a IRC interface.

I dare say I disagree!

As input you get strings which all contain two to ~five nuggets 
of information, where your only two immediately clues are that 
the first character will show if it's an off case (namely PING 
and ERROR), and that the second field as delimeted by whitespace 
-- ^[^ ]+ ([^ ]+).* -- will be the type/action of the event. What 
comes next is highly type-specific and with seemingly ad-hoc 
placement at times, but can be made sense of either with some 
regex, or in an std.algorithmic slicefest with extra countUntils 
for all.