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4df5c7ab18
This optimizes the runtime and memory allocation behavior for label matchers other than type "Equal". Instead of creating a new set for every union of fingerprints, this simply adds new fingerprints to the existing set to achieve the same effect. The current behavior made a production Prometheus unresponsive when running a NotEqual match against the "instance" label (a label with high value cardinality). BEFORE: BenchmarkGetFingerprintsForNotEqualMatcher 10 170430297 ns/op 39229944 B/op 40709 allocs/op AFTER: BenchmarkGetFingerprintsForNotEqualMatcher 5000 706260 ns/op 217717 B/op 1116 allocs/op Change-Id: Ifd78e81e7dfbf5d7249e50ad1903a5d9c42c347a |
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| interface.go | ||