Best case extraction speed of Groupcompress

[John Arbash Meinel]

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> Anyway, running this on the bzr.dev conversion, I see:
>   2,257,171,595 bytes (2.1GiB)
> 10 loops, best of 3: 5.19 sec per loop
> 
> So on my laptop we can extract every text for all of bzr.dev in about
> 5.2 seconds. Or at a rate of approximately 414 MiB/s.
> 
> For texts with a bit less history, I was seeing:
>  903,447,097
> 10 loops, best of 3: 1.51 sec per loop
> Which is 570.6 MiB/s.
> 

Just as a point of comparison, 'openssl speed sha1 aes' says that my
machine can do:

  279.6 MiB/s	sha1
  110.7 MiB/s	aes-128
   85.9 MiB/s	aes-256

So we are ~2x faster at extracting text than computing its sha1. And
about 4x faster than encrypting it.

John
=:->

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