OP#792 initial commit after fork

cmd/metacache-bucket_test.go

@@ -0,0 +1,68 @@
+// Copyright (c) 2015-2021 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Benchmark_bucketMetacache_findCache(b *testing.B) {
+	bm := newBucketMetacache("", false)
+	const elements = 50000
+	const paths = 100
+	if elements%paths != 0 {
+		b.Fatal("elements must be divisible by the number of paths")
+	}
+	var pathNames [paths]string
+	for i := range pathNames[:] {
+		pathNames[i] = fmt.Sprintf("prefix/%d", i)
+	}
+	for i := range elements {
+		bm.findCache(listPathOptions{
+			ID:           mustGetUUID(),
+			Bucket:       "",
+			BaseDir:      pathNames[i%paths],
+			Prefix:       "",
+			FilterPrefix: "",
+			Marker:       "",
+			Limit:        0,
+			AskDisks:     "strict",
+			Recursive:    false,
+			Separator:    slashSeparator,
+			Create:       true,
+		})
+	}
+	b.ReportAllocs()
+
+	for i := 0; b.Loop(); i++ {
+		bm.findCache(listPathOptions{
+			ID:           mustGetUUID(),
+			Bucket:       "",
+			BaseDir:      pathNames[i%paths],
+			Prefix:       "",
+			FilterPrefix: "",
+			Marker:       "",
+			Limit:        0,
+			AskDisks:     "strict",
+			Recursive:    false,
+			Separator:    slashSeparator,
+			Create:       true,
+		})
+	}
+}