From 39a26f2e350fe8474b6137fa63d717db1c2161d8 Mon Sep 17 00:00:00 2001
From: Robert Vollmert <rfvollmert@gmail.com>
Date: Mon, 9 Nov 2015 14:34:37 +0100
Subject: [PATCH] concurrency benchmark

---
 prometheus/benchmark_test.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/prometheus/benchmark_test.go b/prometheus/benchmark_test.go
index 6ae7333..a3d8669 100644
--- a/prometheus/benchmark_test.go
+++ b/prometheus/benchmark_test.go
@@ -14,6 +14,7 @@
 package prometheus
 
 import (
+	"sync"
 	"testing"
 )
 
@@ -32,6 +33,29 @@ func BenchmarkCounterWithLabelValues(b *testing.B) {
 	}
 }
 
+func BenchmarkCounterWithLabelValuesConcurrent(b *testing.B) {
+	m := NewCounterVec(
+		CounterOpts{
+			Name: "benchmark_counter",
+			Help: "A counter to benchmark it.",
+		},
+		[]string{"one", "two", "three"},
+	)
+	b.ReportAllocs()
+	b.ResetTimer()
+	wg := sync.WaitGroup{}
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func() {
+			for j := 0; j < b.N/10; j++ {
+				m.WithLabelValues("eins", "zwei", "drei").Inc()
+			}
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}
+
 func BenchmarkCounterWithMappedLabels(b *testing.B) {
 	m := NewCounterVec(
 		CounterOpts{