More speedup in darcs; "format $date" found to be expensive

[Joachim Breitner]

Hi,

I did some more speed analysis and found that the use of "format $date"
will considerably slow down your analysis. The next release of arbtt
will therefore also provide date literals, so that you can write
	$date >= 2011-01-01 && $date <= 2011-02-01
without conversions to strings or anything of the like.

I can process my own data in just below 9 seconds now; Now the largest
single chunks of time are parsing the binary data and using the regex
library.

Greetings,
Joachim

-- 
Joachim "nomeata" Breitner
  mail at joachim-breitner.de  |  nomeata at debian.org  |  GPG: 0x4743206C
  xmpp: nomeata at joachim-breitner.de | http://www.joachim-breitner.de/

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