index: add BenchmarkCorpusFromStorage

Change-Id: Ifba96f21d5a003150062d988129c2c24fcae878c

pkg/index/corpus_bench_test.go

@@ -0,0 +1,66 @@
+/*
+Copyright 2013 The Camlistore AUTHORS
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package index_test
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"sync"
+	"testing"
+	"time"
+
+	"camlistore.org/pkg/index"
+	"camlistore.org/pkg/index/indextest"
+	"camlistore.org/pkg/sorted"
+	"camlistore.org/pkg/test"
+)
+
+var (
+	buildKvOnce    sync.Once
+	kvForBenchmark sorted.KeyValue
+)
+
+func BenchmarkCorpusFromStorage(b *testing.B) {
+	defer test.TLog(b)()
+	buildKvOnce.Do(func() {
+		kvForBenchmark = sorted.NewMemoryKeyValue()
+		idx := index.New(kvForBenchmark)
+		id := indextest.NewIndexDeps(idx)
+		id.Fataler = b
+		for i := 0; i < 10; i++ {
+			fileRef, _ := id.UploadFile("file.txt", fmt.Sprintf("some file %d", i), time.Unix(1382073153, 0))
+			pn := id.NewPlannedPermanode(fmt.Sprint(i))
+			id.SetAttribute(pn, "camliContent", fileRef.String())
+		}
+	})
+	defer index.ExpSetLogCorpusStats(true)
+	index.ExpSetLogCorpusStats(false)
+
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		_, err := index.NewCorpusFromStorage(kvForBenchmark)
+		if err != nil {
+			b.Fatal(err)
+		}
+		if i == 0 {
+			// Only worth logging any failures in the first round.
+			log.SetOutput(ioutil.Discard)
+		}
+	}
+}