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[PERF] PromQL: only reset labels builder when needed

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Signed-off-by: Linas Medziunas <linas.medziunas@gmail.com>
This commit is contained in:
Linas Medziunas 2025-11-13 11:37:53 +02:00
parent f5d1cb48ca
commit 85150f9dec
1 changed files with 1 additions and 1 deletions
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2
promql/engine.go
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@ -2951,7 +2951,6 @@ func resultMetric(lhs, rhs labels.Labels, op parser.ItemType, matching *parser.V
enh.resultMetric = make(map[string]labels.Labels, len(enh.Out))
}
enh.resetBuilder(lhs)
buf := bytes.NewBuffer(enh.lblResultBuf[:0])
enh.lblBuf = lhs.Bytes(enh.lblBuf)
buf.Write(enh.lblBuf)
@ -2964,6 +2963,7 @@ func resultMetric(lhs, rhs labels.Labels, op parser.ItemType, matching *parser.V
}
str := string(enh.lblResultBuf)
enh.resetBuilder(lhs)
if changesMetricSchema(op) {
// Setting empty Metadata causes the deletion of those if they exists.
schema.Metadata{}.SetToLabels(enh.lb)