diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 939aab45cd..6ab93bd4ee 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -25,7 +25,8 @@ at [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMe
 See [these docs](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#multitenancy-via-labels) for details.
 
 * FEATURE: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): support specifying tenant ids via `vm_account_id` and `vm_project_id` labels. See [these docs](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#multitenancy-via-labels) and [this feature request](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2970).
-* FEATURE: improve [relabeling](https://docs.victoriametrics.com/vmagent.html#relabeling) performance by up to 3x for non-trivial `regex` values.
+* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): improve [relabeling](https://docs.victoriametrics.com/vmagent.html#relabeling) performance by up to 3x for non-trivial `regex` values such as `([^:]+):.+`, which can be used for extracting a `host` part from `host:port` label value.
+* FEATURE: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): improve performance by up to 4x for queries containing non-trivial `regex` filters such as `{path=~"/foo/.+|/bar"}`.
 * FEATURE: sanitize metric names for data ingested via [DataDog protocol](https://docs.victoriametrics.com/#how-to-send-data-from-datadog-agent) according to [DataDog metric naming](https://docs.datadoghq.com/metrics/custom_metrics/#naming-custom-metrics). The behaviour can be disabled by passing `-datadog.sanitizeMetricName=false` command-line flag. Thanks to @PerGon for [the pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3105).
 * FEATURE: add `-usePromCompatibleNaming` command-line flag to [vmagent](https://docs.victoriametrics.com/vmagent.html), to single-node VictoriaMetrics and to `vminsert` component of VictoriaMetrics cluster. This flag can be used for normalizing the ingested metric names and label names to [Prometheus-compatible form](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels). If this flag is set, then all the chars unsupported by Prometheus are replaced with `_` chars in metric names and labels of the ingested samples. See [this feature request](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3113).
 * FEATURE: accept whitespace in metric names and tags ingested via [Graphite plaintext protocol](https://docs.victoriametrics.com/#how-to-send-data-from-graphite-compatible-agents-such-as-statsd) according to [the specs](https://graphite.readthedocs.io/en/latest/tags.html). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3102).
diff --git a/lib/storage/tag_filters.go b/lib/storage/tag_filters.go
index 0577d958c0..c2e4934771 100644
--- a/lib/storage/tag_filters.go
+++ b/lib/storage/tag_filters.go
@@ -602,13 +602,21 @@ func getOptimizedReMatchFunc(reMatch func(b []byte) bool, expr string) (func(b [
 	if err != nil {
 		logger.Panicf("BUG: unexpected error when parsing verified expr=%q: %s", expr, err)
 	}
-	if matchFunc, literalSuffix, reCost := getOptimizedReMatchFuncExt(reMatch, sre); matchFunc != nil {
+	// Prepare fast string matcher for reMatch.
+	fsm := bytesutil.NewFastStringMatcher(func(s string) bool {
+		return reMatch(bytesutil.ToUnsafeBytes(s))
+	})
+	reMatchFast := func(b []byte) bool {
+		return fsm.Match(bytesutil.ToUnsafeString(b))
+	}
+
+	if matchFunc, literalSuffix, reCost := getOptimizedReMatchFuncExt(reMatchFast, sre); matchFunc != nil {
 		// Found optimized function for matching the expr.
 		suffixUnescaped := tagCharsReverseRegexpEscaper.Replace(literalSuffix)
 		return matchFunc, suffixUnescaped, reCost
 	}
-	// Fall back to un-optimized reMatch.
-	return reMatch, "", reMatchCost
+	// Fall back to reMatchFast.
+	return reMatchFast, "", reMatchCost
 }
 
 // These cost values are used for sorting tag filters in ascending order or the required CPU time for execution.