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TSDB: extend BenchmarkMemPostings_PostingsForLabelMatching to check merge speed

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We need to create more postings entries so the merger has some work to do.
Not material for the regexp ones as they match so few series.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This commit is contained in:
Bryan Boreham 2024-07-26 18:17:35 +01:00
parent 5b5fee08af
commit e630ffdbed
1 changed files with 16 additions and 1 deletions
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17
tsdb/index/postings_test.go
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@ -1410,12 +1410,15 @@ func BenchmarkMemPostings_PostingsForLabelMatching(b *testing.B) {
slowRegexp := "^" + slowRegexpString() + "$"
b.Logf("Slow regexp length = %d", len(slowRegexp))
slow := regexp.MustCompile(slowRegexp)
const seriesPerLabel = 10
for _, labelValueCount := range []int{1_000, 10_000, 100_000} {
b.Run(fmt.Sprintf("labels=%d", labelValueCount), func(b *testing.B) {
mp := NewMemPostings()
for i := 0; i < labelValueCount; i++ {
mp.Add(storage.SeriesRef(i), labels.FromStrings("label", strconv.Itoa(i)))
for j := 0; j < seriesPerLabel; j++ {
mp.Add(storage.SeriesRef(i*seriesPerLabel+j), labels.FromStrings("__name__", strconv.Itoa(j), "label", strconv.Itoa(i)))
}
}
fp, err := ExpandPostings(mp.PostingsForLabelMatching(context.Background(), "label", fast.MatchString))
@ -1435,6 +1438,18 @@ func BenchmarkMemPostings_PostingsForLabelMatching(b *testing.B) {
mp.PostingsForLabelMatching(context.Background(), "label", slow.MatchString).Next()
}
})
b.Run("matcher=all", func(b *testing.B) {
for i := 0; i < b.N; i++ {
// Match everything.
p := mp.PostingsForLabelMatching(context.Background(), "label", func(_ string) bool { return true })
var sum storage.SeriesRef
// Iterate through all results to exercise merge function.
for p.Next() {
sum += p.At()
}
}
})
})
}
}