metrics: add handler performance metrics (ethereum#22581)

JukLee0ira · Dec 16, 2024 · 7682b5a · 7682b5a
1 parent f6c569c
commit 7682b5a
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/metrics/histogram.go b/metrics/histogram.go
@@ -26,6 +26,15 @@ func GetOrRegisterHistogram(name string, r Registry, s Sample) Histogram {
 	return r.GetOrRegister(name, func() Histogram { return NewHistogram(s) }).(Histogram)
 }
 
+// GetOrRegisterHistogramLazy returns an existing Histogram or constructs and
+// registers a new StandardHistogram.
+func GetOrRegisterHistogramLazy(name string, r Registry, s func() Sample) Histogram {
+	if nil == r {
+		r = DefaultRegistry
+	}
+	return r.GetOrRegister(name, func() Histogram { return NewHistogram(s()) }).(Histogram)
+}
+
 // NewHistogram constructs a new StandardHistogram from a Sample.
 func NewHistogram(s Sample) Histogram {
 	if !Enabled {