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| author | Dean Rasheed <dean.a.rasheed@gmail.com> | 2023-01-23 11:56:00 +0000 |
|---|---|---|
| committer | Dean Rasheed <dean.a.rasheed@gmail.com> | 2023-01-23 11:58:28 +0000 |
| commit | 0aa38db56bf459d04ed58c22f7c689c0ae14e977 (patch) | |
| tree | 474a0e6f46170362237b3a6b498be2434aa15a93 /src/backend/access/gist/gistxlog.c | |
| parent | 009dbdea02d74c72db2d1a57d5299f94f91fa975 (diff) | |
| download | postgresql-0aa38db56bf459d04ed58c22f7c689c0ae14e977.tar.gz postgresql-0aa38db56bf459d04ed58c22f7c689c0ae14e977.zip | |
Optimise numeric division for 3 and 4 base-NBASE digit divisors.
On platforms with 128-bit integer support, introduce a new function
div_var_int64(), along the same lines as div_var_int() added in
d1b307eef2 for divisors with 1 or 2 base-NBASE digits, and use it to
speed up div_var() and div_var_fast() in a similar way when the
divisor has 3 or 4 base-NBASE digits.
This gives significant performance gains for divisors with 9-16
decimal digits.
Joel Jacobson.
Discussion:
https://postgr.es/m/b7a5893d-af18-4c0b-8918-96de5f1bbf39%40app.fastmail.com
https://postgr.es/m/CAEZATCXGm%3DDyTq%3DFrcOqC0gPMVveKUYTaD5KRRoajrUTiWxVMw%40mail.gmail.com
Diffstat (limited to 'src/backend/access/gist/gistxlog.c')
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