[MERGE] knit performance improvements

Robert Collins robertc at robertcollins.net
Mon Apr 3 01:13:43 BST 2006


This patch makes knits more performant in a number of ways.

It contains:
 * A tweak to missing that I commited in here by mistake which defers
taking write locks unless needed.
   (I'll update that to not conflict with Aarons patch if his has been
    merged).
 * Various microoptimisations to knit and gzip - reducing function call 
   counts in inner loops, reducing double-handling of data, increasing
   knit header parsing performance, removing 'list.index' calls
   completely etc.
 * changes the data format of knits to remove an extraneous \n in the 
   compressed content data, which lets it be trivially pulled into 
   memory in a single 'readlines()' call.
 * changes the knit repository to use unannotated knits for inventory,
   revisions, and signatures. Also turns off delta-compression for
   revisions and signatures.



-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
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