I wrote: > The test is attached and the test function is part of the patch. It's > based on the test used in the commit above. The test searches for a > string that's at the end of a ~1 million byte string. This is on gcc > 11 with 2-3 runs to ensure repeatability, but I didn't bother with > statistics because the differences are pretty big: > > patch | no match | ascii | mulitbyte > -----------------------------------------+----------+-------+----------- > PG11 | 1120 | 1100 | 900 > master | 381 | 2350 | 1900 > DFA | 386 | 1640 | 1640 > branchless utf mblen | 387 | 4100 | 2600 > inline pg_utf_mblen() | 380 | 1080 | 920 > inline pg_utf_mblen() + ascii fast path | 382 | 470 | 918
I failed to mention that the above numbers are milliseconds, so smaller is better. -- John Naylor EDB: http://www.enterprisedb.com
