diff --git a/model/labels/labels_string.go b/model/labels/labels_string.go
index eb98fd6fb..223aa6ebf 100644
--- a/model/labels/labels_string.go
+++ b/model/labels/labels_string.go
@@ -273,13 +273,27 @@ func (ls Labels) Copy() Labels {
 // Get returns the value for the label with the given name.
 // Returns an empty string if the label doesn't exist.
 func (ls Labels) Get(name string) string {
+	if name == "" { // Avoid crash in loop if someone asks for "".
+		return "" // Prometheus does not store blank label names.
+	}
 	for i := 0; i < len(ls.data); {
-		var lName, lValue string
-		lName, i = decodeString(ls.data, i)
-		lValue, i = decodeString(ls.data, i)
-		if lName == name {
-			return lValue
+		var size int
+		size, i = decodeSize(ls.data, i)
+		if ls.data[i] == name[0] {
+			lName := ls.data[i : i+size]
+			i += size
+			if lName == name {
+				lValue, _ := decodeString(ls.data, i)
+				return lValue
+			}
+		} else {
+			if ls.data[i] > name[0] { // Stop looking if we've gone past.
+				break
+			}
+			i += size
 		}
+		size, i = decodeSize(ls.data, i)
+		i += size
 	}
 	return ""
 }
diff --git a/model/labels/labels_test.go b/model/labels/labels_test.go
index f0f05734b..d91be27cb 100644
--- a/model/labels/labels_test.go
+++ b/model/labels/labels_test.go
@@ -443,7 +443,8 @@ func TestLabels_Has(t *testing.T) {
 
 func TestLabels_Get(t *testing.T) {
 	require.Equal(t, "", FromStrings("aaa", "111", "bbb", "222").Get("foo"))
-	require.Equal(t, "111", FromStrings("aaa", "111", "bbb", "222").Get("aaa"))
+	require.Equal(t, "111", FromStrings("aaaa", "111", "bbb", "222").Get("aaaa"))
+	require.Equal(t, "222", FromStrings("aaaa", "111", "bbb", "222").Get("bbb"))
 }
 
 // BenchmarkLabels_Get was written to check whether a binary search can improve the performance vs the linear search implementation
@@ -463,7 +464,7 @@ func BenchmarkLabels_Get(b *testing.B) {
 	maxLabels := 30
 	allLabels := make([]Label, maxLabels)
 	for i := 0; i < maxLabels; i++ {
-		allLabels[i] = Label{Name: strings.Repeat(string('a'+byte(i)), 5)}
+		allLabels[i] = Label{Name: strings.Repeat(string('a'+byte(i)), 5+(i%5))}
 	}
 	for _, size := range []int{5, 10, maxLabels} {
 		b.Run(fmt.Sprintf("with %d labels", size), func(b *testing.B) {
@@ -474,6 +475,7 @@ func BenchmarkLabels_Get(b *testing.B) {
 				{"get first label", allLabels[0].Name},
 				{"get middle label", allLabels[size/2].Name},
 				{"get last label", allLabels[size-1].Name},
+				{"get not-found label", "benchmark"},
 			} {
 				b.Run(scenario.desc, func(b *testing.B) {
 					b.ResetTimer()