upload android base code part3

android/build/kati/testcase/parse_benchcmp.go

@@ -0,0 +1,108 @@
+// Copyright 2015 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.
+
+/*
+Program parse_benchcmp runs testcase_parse_benchmark and displays
+performance changes.
+
+*/
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func run(prog string, args ...string) {
+	cmd := exec.Command(prog, args...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		panic(err)
+	}
+}
+
+func output(prog string, args ...string) string {
+	cmd := exec.Command(prog, args...)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		panic(err)
+	}
+	return strings.TrimSpace(string(out))
+}
+
+func runBenchtest(fname string) {
+	run("go", "generate")
+	f, err := os.Create(fname)
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		err = f.Close()
+		if err != nil {
+			panic(err)
+		}
+	}()
+	cmd := exec.Command("go", "test", "-run", "NONE", "-bench", ".")
+	cmd.Stdout = f
+	err = cmd.Run()
+	if err != nil {
+		panic(err)
+	}
+}
+
+func main() {
+	_, err := exec.LookPath("benchcmp")
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "benchcmp not found:", err)
+		fmt.Fprintln(os.Stderr, "install it by:")
+		fmt.Fprintln(os.Stderr, " export GOPATH=$HOME  # if not set")
+		fmt.Fprintln(os.Stderr, " PATH=$PATH:$GOPATH/bin")
+		fmt.Fprintln(os.Stderr, " go get -u golang.org/x/tools/cmd/benchcmp")
+		os.Exit(1)
+	}
+	status := output("git", "status", "-s")
+	if status != "" {
+		fmt.Fprintln(os.Stderr, "workspace is dirty. please commit.")
+		fmt.Fprintln(os.Stderr, status)
+		os.Exit(1)
+	}
+	curBranch := output("git", "symbolic-ref", "--short", "HEAD")
+	if curBranch == "master" {
+		fmt.Fprintln(os.Stderr, "current branch is master.")
+		fmt.Fprintln(os.Stderr, "run in branch to compare with master.")
+		os.Exit(1)
+	}
+	fmt.Println("Run benchmark on master and ", curBranch)
+	fmt.Println("git checkout master")
+	run("git", "checkout", "master")
+	run("git", "clean", "-f")
+	commit := output("git", "log", "--oneline", "-1")
+	fmt.Println(commit)
+	fmt.Println("running benchmark tests...")
+	runBenchtest("bench-old.out")
+
+	fmt.Println("git checkout", curBranch)
+	run("git", "checkout", curBranch)
+	run("git", "clean", "-f")
+	commit = output("git", "log", "--oneline", "-1")
+	fmt.Println(commit)
+	fmt.Println("running benchmark tests...")
+	runBenchtest("bench-new.out")
+
+	run("benchcmp", "bench-old.out", "bench-new.out")
+}