localfs: added ReadDir() benchmark (#1396)

$ go test -benchmem -count 5 -benchtime 5s -run=^$ -bench "^BenchmarkReadDir.*$" ./fs/localfs goos: darwin goarch: amd64 pkg: github.com/kopia/kopia/fs/localfs cpu: Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz BenchmarkReadDir0-8 206330 28408 ns/op 1880 B/op 11 allocs/op BenchmarkReadDir0-8 209636 28399 ns/op 1928 B/op 11 allocs/op BenchmarkReadDir0-8 208366 28569 ns/op 1880 B/op 11 allocs/op BenchmarkReadDir0-8 203073 28888 ns/op 1880 B/op 11 allocs/op BenchmarkReadDir0-8 209492 28477 ns/op 1928 B/op 11 allocs/op BenchmarkReadDir1-8 163614 37236 ns/op 3736 B/op 21 allocs/op BenchmarkReadDir1-8 151528 38796 ns/op 3736 B/op 21 allocs/op BenchmarkReadDir1-8 161023 38420 ns/op 3736 B/op 21 allocs/op BenchmarkReadDir1-8 153543 37262 ns/op 3736 B/op 21 allocs/op BenchmarkReadDir1-8 165090 36362 ns/op 3736 B/op 21 allocs/op BenchmarkReadDir2-8 137521 43338 ns/op 4456 B/op 30 allocs/op BenchmarkReadDir2-8 138085 43866 ns/op 4456 B/op 30 allocs/op BenchmarkReadDir2-8 136701 43389 ns/op 4456 B/op 30 allocs/op BenchmarkReadDir2-8 138116 43342 ns/op 4456 B/op 30 allocs/op BenchmarkReadDir2-8 138170 43379 ns/op 4456 B/op 30 allocs/op BenchmarkReadDir10-8 62124 96602 ns/op 10104 B/op 76 allocs/op BenchmarkReadDir10-8 60532 97361 ns/op 10104 B/op 76 allocs/op BenchmarkReadDir10-8 61009 97615 ns/op 10104 B/op 76 allocs/op BenchmarkReadDir10-8 62072 96550 ns/op 10104 B/op 76 allocs/op BenchmarkReadDir10-8 62220 95925 ns/op 10104 B/op 76 allocs/op BenchmarkReadDir100-8 8028 716714 ns/op 80763 B/op 544 allocs/op BenchmarkReadDir100-8 8066 712266 ns/op 80755 B/op 544 allocs/op BenchmarkReadDir100-8 8047 712203 ns/op 80755 B/op 544 allocs/op BenchmarkReadDir100-8 8107 711148 ns/op 80752 B/op 544 allocs/op BenchmarkReadDir100-8 8127 709227 ns/op 80753 B/op 544 allocs/op BenchmarkReadDir1000-8 1558 3861176 ns/op 689409 B/op 5137 allocs/op BenchmarkReadDir1000-8 1566 3848730 ns/op 689414 B/op 5137 allocs/op BenchmarkReadDir1000-8 1516 3838727 ns/op 689412 B/op 5137 allocs/op BenchmarkReadDir1000-8 1550 3833432 ns/op 689415 B/op 5137 allocs/op BenchmarkReadDir1000-8 1557 3966338 ns/op 689408 B/op 5137 allocs/op BenchmarkReadDir10000-8 178 33901454 ns/op 7282295 B/op 51046 allocs/op BenchmarkReadDir10000-8 177 33865198 ns/op 7282296 B/op 51046 allocs/op BenchmarkReadDir10000-8 172 34687834 ns/op 7282354 B/op 51047 allocs/op BenchmarkReadDir10000-8 174 34483220 ns/op 7282359 B/op 51047 allocs/op BenchmarkReadDir10000-8 178 34227937 ns/op 7282307 B/op 51047 allocs/op PASS ok github.com/kopia/kopia/fs/localfs 268.048s
2026-07-27 22:06:57 -04:00 · 2021-10-16 10:14:18 -07:00
parent ff470ba67d
commit c8b8dc9ec7
1 changed files with 61 additions and 0 deletions
--- a/fs/localfs/localfs_benchmark_test.go
+++ b/fs/localfs/localfs_benchmark_test.go
@@ -0,0 +1,61 @@
+package localfs_test
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/google/uuid"
+
+	"github.com/kopia/kopia/fs/localfs"
+)
+
+func BenchmarkReadDir0(b *testing.B) {
+	benchmarkReadDirWithCount(b, 0)
+}
+
+func BenchmarkReadDir1(b *testing.B) {
+	benchmarkReadDirWithCount(b, 1)
+}
+
+func BenchmarkReadDir2(b *testing.B) {
+	benchmarkReadDirWithCount(b, 2)
+}
+
+func BenchmarkReadDir10(b *testing.B) {
+	benchmarkReadDirWithCount(b, 10)
+}
+
+func BenchmarkReadDir100(b *testing.B) {
+	benchmarkReadDirWithCount(b, 100)
+}
+
+func BenchmarkReadDir1000(b *testing.B) {
+	benchmarkReadDirWithCount(b, 1000)
+}
+
+func BenchmarkReadDir10000(b *testing.B) {
+	benchmarkReadDirWithCount(b, 10000)
+}
+
+func benchmarkReadDirWithCount(b *testing.B, fileCount int) {
+	b.Helper()
+
+	b.StopTimer()
+
+	td := b.TempDir()
+
+	for i := 0; i < fileCount; i++ {
+		os.WriteFile(filepath.Join(td, uuid.NewString()), []byte{1, 2, 3, 4}, 0o644)
+	}
+
+	b.StartTimer()
+
+	ctx := context.Background()
+
+	for i := 0; i < b.N; i++ {
+		dir, _ := localfs.Directory(td)
+		dir.Readdir(ctx)
+	}
+}