105 lines
2.4 KiB
Go
105 lines
2.4 KiB
Go
// Copyright 2013 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package decoding
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import (
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"runtime"
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"testing"
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)
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func TestFingerprintComparison(t *testing.T) {
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fingerprints := []*Fingerprint{
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{
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hash: 0,
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firstCharacterOfFirstLabelName: "b",
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labelMatterLength: 1,
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lastCharacterOfLastLabelValue: "b",
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},
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{
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hash: 1,
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firstCharacterOfFirstLabelName: "a",
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labelMatterLength: 0,
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lastCharacterOfLastLabelValue: "a",
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},
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{
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hash: 1,
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firstCharacterOfFirstLabelName: "a",
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labelMatterLength: 1000,
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lastCharacterOfLastLabelValue: "b",
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},
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{
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hash: 1,
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firstCharacterOfFirstLabelName: "b",
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labelMatterLength: 0,
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lastCharacterOfLastLabelValue: "a",
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},
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{
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hash: 1,
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firstCharacterOfFirstLabelName: "b",
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labelMatterLength: 1,
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lastCharacterOfLastLabelValue: "a",
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},
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{
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hash: 1,
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firstCharacterOfFirstLabelName: "b",
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labelMatterLength: 1,
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lastCharacterOfLastLabelValue: "b",
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},
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}
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for i := range fingerprints {
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if i == 0 {
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continue
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}
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if !fingerprints[i-1].Less(fingerprints[i]) {
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t.Errorf("%d expected %s < %s", i, fingerprints[i-1], fingerprints[i])
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}
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}
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}
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func BenchmarkFingerprinting(b *testing.B) {
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b.StopTimer()
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fps := []*Fingerprint{
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{
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hash: 0,
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firstCharacterOfFirstLabelName: "a",
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labelMatterLength: 2,
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lastCharacterOfLastLabelValue: "z",
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},
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{
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hash: 0,
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firstCharacterOfFirstLabelName: "a",
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labelMatterLength: 2,
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lastCharacterOfLastLabelValue: "z",
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},
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}
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for i := 0; i < 10; i++ {
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fps[0].Less(fps[1])
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}
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b.Logf("N: %v", b.N)
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b.StartTimer()
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var pre runtime.MemStats
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runtime.ReadMemStats(&pre)
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for i := 0; i < b.N; i++ {
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fps[0].Less(fps[1])
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}
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var post runtime.MemStats
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runtime.ReadMemStats(&post)
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b.Logf("allocs: %d items: ", post.TotalAlloc-pre.TotalAlloc)
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}
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