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// Copyright 2017 Google Inc. 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.
// sample program that is used to produce some of the files in
// pprof/internal/report/testdata.
package main
import (
"flag"
"fmt"
"log"
"math"
"os"
"runtime/pprof"
)
var cpuProfile = flag.String("cpuprofile", "", "where to write cpu profile")
func main() {
flag.Parse()
f, err := os.Create(*cpuProfile)
if err != nil {
log.Fatal("could not create CPU profile: ", err)
}
if err := pprof.StartCPUProfile(f); err != nil {
log.Fatal("could not start CPU profile: ", err)
}
defer pprof.StopCPUProfile()
busyLoop()
}
func busyLoop() {
m := make(map[int]int)
for i := 0; i < 1000000; i++ {
m[i] = i + 10
}
var sum float64
for i := 0; i < 100; i++ {
for _, v := range m {
sum += math.Abs(float64(v))
}
}
fmt.Println("Sum", sum)
}
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