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// Copyright 2015 The Hugo Authors. All rights reserved.
//
// 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 commands
import (
"os"
"runtime"
"runtime/pprof"
"time"
"github.com/spf13/cobra"
jww "github.com/spf13/jwalterweatherman"
)
var (
benchmarkTimes int
cpuProfileFile string
memProfileFile string
)
var benchmarkCmd = &cobra.Command{
Use: "benchmark",
Short: "Benchmark Hugo by building a site a number of times.",
Long: `Hugo can build a site many times over and analyze the running process
creating a benchmark.`,
}
func init() {
initHugoBuilderFlags(benchmarkCmd)
initBenchmarkBuildingFlags(benchmarkCmd)
benchmarkCmd.Flags().StringVar(&cpuProfileFile, "cpuprofile", "", "path/filename for the CPU profile file")
benchmarkCmd.Flags().StringVar(&memProfileFile, "memprofile", "", "path/filename for the memory profile file")
benchmarkCmd.Flags().IntVarP(&benchmarkTimes, "count", "n", 13, "number of times to build the site")
benchmarkCmd.RunE = benchmark
}
func benchmark(cmd *cobra.Command, args []string) error {
c, err := InitializeConfig(false, nil, benchmarkCmd)
if err != nil {
return err
}
var memProf *os.File
if memProfileFile != "" {
memProf, err = os.Create(memProfileFile)
if err != nil {
return err
}
}
var cpuProf *os.File
if cpuProfileFile != "" {
cpuProf, err = os.Create(cpuProfileFile)
if err != nil {
return err
}
}
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
memAllocated := memStats.TotalAlloc
mallocs := memStats.Mallocs
if cpuProf != nil {
pprof.StartCPUProfile(cpuProf)
}
t := time.Now()
for i := 0; i < benchmarkTimes; i++ {
if err = c.resetAndBuildSites(); err != nil {
return err
}
}
totalTime := time.Since(t)
if memProf != nil {
pprof.WriteHeapProfile(memProf)
memProf.Close()
}
if cpuProf != nil {
pprof.StopCPUProfile()
cpuProf.Close()
}
runtime.ReadMemStats(&memStats)
totalMemAllocated := memStats.TotalAlloc - memAllocated
totalMallocs := memStats.Mallocs - mallocs
jww.FEEDBACK.Println()
jww.FEEDBACK.Printf("Average time per operation: %vms\n", int(1000*totalTime.Seconds()/float64(benchmarkTimes)))
jww.FEEDBACK.Printf("Average memory allocated per operation: %vkB\n", totalMemAllocated/uint64(benchmarkTimes)/1024)
jww.FEEDBACK.Printf("Average allocations per operation: %v\n", totalMallocs/uint64(benchmarkTimes))
return nil
}
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