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ed4f1edbd7
It is slightly slower, but correctnes is, of course, more important: ```bash benchmark old ns/op new ns/op delta BenchmarkSortByWeightAndReverse-4 367 645 +75.75% benchmark old allocs new allocs delta BenchmarkSortByWeightAndReverse-4 2 2 +0.00% benchmark old bytes new bytes delta BenchmarkSortByWeightAndReverse-4 64 64 +0.00% ``` Running the same benchmark without any cache (i.e. resorting the slice on every iteration) and then compare it to the current version shows that it still is plenty worth it: ```bash ▶ benchcmp 2.bench 1.bench benchmark old ns/op new ns/op delta BenchmarkSortByWeightAndReverse-4 1358757 645 -99.95% benchmark old allocs new allocs delta BenchmarkSortByWeightAndReverse-4 17159 2 -99.99% benchmark old bytes new bytes delta BenchmarkSortByWeightAndReverse-4 274573 64 -99.98% ``` Closes #5239
89 lines
2 KiB
Go
89 lines
2 KiB
Go
// Copyright 2015 The Hugo Authors. All rights reserved.
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//
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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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// 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 hugolib
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import (
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"strconv"
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"sync"
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"sync/atomic"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestPageCache(t *testing.T) {
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t.Parallel()
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c1 := newPageCache()
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changeFirst := func(p Pages) {
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p[0].Description = "changed"
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}
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var o1 uint64
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var o2 uint64
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var wg sync.WaitGroup
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var l1 sync.Mutex
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var l2 sync.Mutex
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var testPageSets []Pages
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s := newTestSite(t)
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for i := 0; i < 50; i++ {
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testPageSets = append(testPageSets, createSortTestPages(s, i+1))
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}
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for j := 0; j < 100; j++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for k, pages := range testPageSets {
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l1.Lock()
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p, c := c1.get("k1", nil, pages)
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assert.Equal(t, !atomic.CompareAndSwapUint64(&o1, uint64(k), uint64(k+1)), c)
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l1.Unlock()
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p2, c2 := c1.get("k1", nil, p)
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assert.True(t, c2)
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assert.True(t, pagesEqual(p, p2))
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assert.True(t, pagesEqual(p, pages))
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assert.NotNil(t, p)
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l2.Lock()
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p3, c3 := c1.get("k2", changeFirst, pages)
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assert.Equal(t, !atomic.CompareAndSwapUint64(&o2, uint64(k), uint64(k+1)), c3)
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l2.Unlock()
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assert.NotNil(t, p3)
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assert.Equal(t, p3[0].Description, "changed")
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}
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}()
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}
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wg.Wait()
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}
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func BenchmarkPageCache(b *testing.B) {
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cache := newPageCache()
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pages := make(Pages, 30)
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for i := 0; i < 30; i++ {
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pages[i] = &Page{title: "p" + strconv.Itoa(i)}
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}
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key := "key"
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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cache.getP(key, nil, pages)
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}
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}
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