Thread: pgsql: Make abbreviated key comparisons for text a bit cheaper.

Make abbreviated key comparisons for text a bit cheaper.

If we do some byte-swapping while abbreviating, we can do comparisons
using integer arithmetic rather than memcmp.

Peter Geoghegan, reviewed and slightly revised by me.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/bfb54ff15a447fb22e9deae096e0d45b3e4bd56f

Modified Files
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src/backend/utils/adt/varlena.c |   29 ++++++++++++++++++++---------
src/include/port/pg_bswap.h     |   26 ++++++++++++++++++++++++--
2 files changed, 44 insertions(+), 11 deletions(-)