Horton

Improve hash method for bitmapsets: some examination of actual outputs

Tom Lane <tgl@sss.pgh.pa.us>

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Commit: e5a11a8879c653d171497f8adec68f8997a4c4cf
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2005-06-15T16:24:07Z
Releases: 8.1.0 
Improve hash method for bitmapsets: some examination of actual outputs
shows that adding a circular shift between words greatly improves the
distribution of hash outputs.

Files

PathChange+/−
src/backend/nodes/bitmapset.c modified +21 −7