diff --git a/CHANGELOG.md b/CHANGELOG.md
index 685f799212..2f6c4a06ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -55,6 +55,7 @@ Main (unreleased)
 
 - Upgrade `github.com/goccy/go-json` to v0.10.4, which reduces the memory consumption of an Alloy instance by 20MB.
   If Alloy is running certain otelcol components, this reduction will not apply. (@ptodev)
+- improve performance in regexp component: call fmt only if debug is enabled (@r0ka)
 
 - Update `prometheus.write.queue` library for performance increases in cpu. (@mattdurham)
 
diff --git a/internal/component/loki/process/stages/regex.go b/internal/component/loki/process/stages/regex.go
index 531c230515..42625f2cee 100644
--- a/internal/component/loki/process/stages/regex.go
+++ b/internal/component/loki/process/stages/regex.go
@@ -112,7 +112,9 @@ func (r *regexStage) Process(labels model.LabelSet, extracted map[string]interfa
 			extracted[name] = match[i]
 		}
 	}
-	level.Debug(r.logger).Log("msg", "extracted data debug in regex stage", "extracted data", fmt.Sprintf("%v", extracted))
+	if Debug {
+		level.Debug(r.logger).Log("msg", "extracted data debug in regex stage", "extracted data", fmt.Sprintf("%v", extracted))
+	}
 }
 
 // Name implements Stage