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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2001-11-17 06:09:30 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2001-11-17 06:09:30 +0000 |
| commit | 6b516f59517450f9a3590338e995de22b22a9335 (patch) | |
| tree | 21e10c007ab8c36c8472080f238d6b15805a6610 /src/tutorial/advanced.source | |
| parent | dc6efa44e263b9ead55eddefa61841d05b1a75f1 (diff) | |
Fix performance problems in TOAST compressor. The management of
search lists was broken in such a way that only the most recent
instance of a given hash code would ever be searched, thus possibly
missing longer matches further back. Fixing this gave 5 to 10%
compression improvement on some text test cases. Additional small
tweaks to improve speed of inner loops a little bit. There is no
compatibility issue created by this change, since the compressed data
format and decompression algorithm don't change.
Diffstat (limited to 'src/tutorial/advanced.source')
0 files changed, 0 insertions, 0 deletions