Aliaksandr Valialkin
2b3235414b
lib/regexutil: properly handle alternate regexps surrounded by .+ or .*
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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 18:29:42 +01:00
Aliaksandr Valialkin
f38c9db74d
lib/promrelabel: there is no need in calling regex.HasPrefix() after the optimization at 17289ff481
2022-09-30 12:28:25 +03:00
Aliaksandr Valialkin
b4bb1477fe
lib/regexutil: cache MatchString results for unoptimized regexps
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This increases relabeling performance by 3x for unoptimized regexs
2022-09-30 12:28:25 +03:00
Aliaksandr Valialkin
cead9c1e67
lib/promrelabel: call PromRegex.MatchString() on a slow path only if it contains non-empty literal prefix
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This should improve slow path speed for regexps without literal prefixes
2022-08-26 21:48:09 +03:00
Aliaksandr Valialkin
da7697fda4
lib/promrelabel: use regexutil.PromRegex for regex matching in actions labeldrop,labelkeep,drop and keep
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This makes possible optimizing additional cases inside regexutil.PromRegex
2022-08-26 15:48:11 +03:00
Aliaksandr Valialkin
e1bd38fa97
lib/promrelabel: optimize matching for commonly used regex patterns in if option
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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 14:55:13 +03:00
