108 lines
2.8 KiB
Go
108 lines
2.8 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 commands
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import (
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"os"
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"runtime"
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"runtime/pprof"
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"time"
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"github.com/spf13/cobra"
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jww "github.com/spf13/jwalterweatherman"
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)
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var (
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benchmarkTimes int
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cpuProfileFile string
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memProfileFile string
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)
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var benchmarkCmd = &cobra.Command{
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Use: "benchmark",
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Short: "Benchmark Hugo by building a site a number of times.",
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Long: `Hugo can build a site many times over and analyze the running process
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creating a benchmark.`,
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}
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func init() {
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initHugoBuilderFlags(benchmarkCmd)
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initBenchmarkBuildingFlags(benchmarkCmd)
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benchmarkCmd.Flags().StringVar(&cpuProfileFile, "cpuprofile", "", "path/filename for the CPU profile file")
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benchmarkCmd.Flags().StringVar(&memProfileFile, "memprofile", "", "path/filename for the memory profile file")
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benchmarkCmd.Flags().IntVarP(&benchmarkTimes, "count", "n", 13, "number of times to build the site")
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benchmarkCmd.RunE = benchmark
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}
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func benchmark(cmd *cobra.Command, args []string) error {
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c, err := InitializeConfig(false, nil, benchmarkCmd)
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if err != nil {
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return err
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}
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var memProf *os.File
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if memProfileFile != "" {
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memProf, err = os.Create(memProfileFile)
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if err != nil {
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return err
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}
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}
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var cpuProf *os.File
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if cpuProfileFile != "" {
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cpuProf, err = os.Create(cpuProfileFile)
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if err != nil {
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return err
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}
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}
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var memStats runtime.MemStats
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runtime.ReadMemStats(&memStats)
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memAllocated := memStats.TotalAlloc
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mallocs := memStats.Mallocs
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if cpuProf != nil {
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pprof.StartCPUProfile(cpuProf)
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}
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t := time.Now()
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for i := 0; i < benchmarkTimes; i++ {
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if err = c.resetAndBuildSites(); err != nil {
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return err
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}
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}
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totalTime := time.Since(t)
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if memProf != nil {
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pprof.WriteHeapProfile(memProf)
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memProf.Close()
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}
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if cpuProf != nil {
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pprof.StopCPUProfile()
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cpuProf.Close()
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}
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runtime.ReadMemStats(&memStats)
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totalMemAllocated := memStats.TotalAlloc - memAllocated
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totalMallocs := memStats.Mallocs - mallocs
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jww.FEEDBACK.Println()
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jww.FEEDBACK.Printf("Average time per operation: %vms\n", int(1000*totalTime.Seconds()/float64(benchmarkTimes)))
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jww.FEEDBACK.Printf("Average memory allocated per operation: %vkB\n", totalMemAllocated/uint64(benchmarkTimes)/1024)
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jww.FEEDBACK.Printf("Average allocations per operation: %v\n", totalMallocs/uint64(benchmarkTimes))
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return nil
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}
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