Commit graph

3 commits

Author SHA1 Message Date
Aliaksandr Valialkin
3e93fa61ad
lib/regexutil: properly handle alternate regexps surrounded by .+ or .*
Previously the following regexps were improperly handled:

  .+foo|bar.+
  .*foo|bar.*

This could lead to unexpected regexp match results.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5297

Thanks to @Haleygo for the initial attempt to fix the issue at https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5308
2023-11-13 18:23:38 +01:00
Aliaksandr Valialkin
f49c9bb700
lib/promrelabel: optimize common regex mismatch cases for action: replace and action: labelmap 2022-08-26 15:45:31 +03:00
Aliaksandr Valialkin
7afe8450fc
lib/promrelabel: optimize matching for commonly used regex patterns in if option
The following regex patterns are optimized:

- literal string match, e.g. "foo"
- prefix match, e.g. "foo.*" and "foo.+"
- substring match, e.g. ".*foo.*" and ".+foo.+"
- alternate values match, e.g. "foo|bar|baz"
2022-08-26 14:53:06 +03:00