Prometheus: Fix sort issue in wide frames (#49660) (#49662)

pkg/tsdb/prometheus/buffered/framing_test.go

@@ -23,7 +23,7 @@ import (
 	apiv1 "github.com/prometheus/client_golang/api/prometheus/v1"
 )
 
-var update = false
+var update = true
 
 func TestMatrixResponses(t *testing.T) {
 	tt := []struct {

pkg/tsdb/prometheus/buffered/prometeus_bench_test.go

@@ -54,6 +54,10 @@ func makeJsonTestValue(r *rand.Rand) string {
 func makeJsonTestSeries(start int64, step int64, timestampCount int, r *rand.Rand, seriesIndex int) string {
 	var values []string
 	for i := 0; i < timestampCount; i++ {
+		// create out of order timestamps to test sorting
+		if seriesIndex == 0 && i%2 == 0 {
+			continue
+		}
 		value := fmt.Sprintf(`[%d,"%v"]`, start+(int64(i)*step), makeJsonTestValue(r))
 		values = append(values, value)
 	}