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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2021-12-14 13:35:22 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2021-12-14 13:35:22 -0500 |
| commit | a2ff18e89ff8f29677084bffd1e3de9ca6cd7224 (patch) | |
| tree | 0aed672d8006e3427abf0ea204a854836c057a4c /src/backend/lib/dshash.c | |
| parent | 2de3c1015cb2556af501c630b1768a20f111fe95 (diff) | |
| download | postgresql-a2ff18e89ff8f29677084bffd1e3de9ca6cd7224.tar.gz postgresql-a2ff18e89ff8f29677084bffd1e3de9ca6cd7224.zip | |
Improve sift up/down code in binaryheap.c and logtape.c.
Borrow the logic that's long been used in tuplesort.c: instead
of physically swapping the data in two heap entries, keep the
value that's being sifted up or down in a local variable, and
just move the other values as necessary. This makes the code
shorter as well as faster. It's not clear that any current
callers are really time-critical enough to notice, but we
might as well code heap maintenance the same way everywhere.
Ma Liangzhu and Tom Lane
Discussion: https://postgr.es/m/17336-fc4e522d26a750fd@postgresql.org
Diffstat (limited to 'src/backend/lib/dshash.c')
0 files changed, 0 insertions, 0 deletions