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- Committer: John Arbash Meinel
- Date: 2008-08-21 19:53:53 UTC
- mto: This revision was merged to the branch mainline in revision 3644.
- Revision ID: john@arbash-meinel.com-20080821195353-1q7mrhcjqerr5rhh
Somewhat surprisingly, tracking bytes_out_len makes a
large difference in performance. It drops the three_level test time
from 9.2s => 8.2s. My best guess is that when adding with Z_SYNC_FLUSH
we get a *lot* of small strings, and we loop over it each time
we add another string.
Real world tests show improvement, too.
For mysql, repack=2,nocopy time 59.3=>57.4
For bzr.dev, repack=2,nocopy time 9.6=>9.3
large difference in performance. It drops the three_level test time
from 9.2s => 8.2s. My best guess is that when adding with Z_SYNC_FLUSH
we get a *lot* of small strings, and we loop over it each time
we add another string.
Real world tests show improvement, too.
For mysql, repack=2,nocopy time 59.3=>57.4
For bzr.dev, repack=2,nocopy time 9.6=>9.3
added
removed
bzrlib/btree_index.py
