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| author | David Rowley <drowley@postgresql.org> | 2023-10-09 17:25:16 +1300 |
|---|---|---|
| committer | David Rowley <drowley@postgresql.org> | 2023-10-09 17:25:16 +1300 |
| commit | 608fd198def5390c3490bfe903730207dfd8eeb4 (patch) | |
| tree | b252efcaca1e13db80542ecd3913074a167a3590 /src/backend/access/gist/gistutil.c | |
| parent | 7cc2f59dd57ab275497ae42a4f98e7936e1e3723 (diff) | |
| download | postgresql-608fd198def5390c3490bfe903730207dfd8eeb4.tar.gz postgresql-608fd198def5390c3490bfe903730207dfd8eeb4.zip | |
Optimize various aggregate deserialization functions
The serialized representation of an internal aggregate state is a bytea
value. In each deserial function, in order to "receive" the bytea value
we appended it onto a short-lived StringInfoData using
appendBinaryStringInfo. This was a little wasteful as it meant having to
palloc memory, copy a (possibly long) series of bytes then later pfree
that memory. Instead of going to this extra trouble, we can just fake up
a StringInfoData and point the data directly at the bytea's payload. This
should help increase the performance of internal aggregate
deserialization.
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/CAApHDvr=e-YOigriSHHm324a40HPqcUhSp6pWWgjz5WwegR=cQ@mail.gmail.com
Diffstat (limited to 'src/backend/access/gist/gistutil.c')
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