97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
// Copyright 2022 The Tint Authors.
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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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//
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// https://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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// benchdiff is a tool that compares two Google benchmark results and displays
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// sorted performance differences.
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package main
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import (
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"time"
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"dawn.googlesource.com/dawn/tools/src/bench"
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)
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var (
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minDiff = flag.Duration("min-diff", time.Microsecond*10, "Filter away time diffs less than this duration")
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minRelDiff = flag.Float64("min-rel-diff", 0.01, "Filter away absolute relative diffs between [1, 1+x]")
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)
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func main() {
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flag.ErrHelp = errors.New("benchdiff is a tool to compare two benchmark results")
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flag.Usage = func() {
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fmt.Fprintln(os.Stderr, "benchdiff <benchmark-a> <benchmark-b>")
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flag.PrintDefaults()
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}
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flag.Parse()
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args := flag.Args()
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if len(args) < 2 {
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flag.Usage()
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os.Exit(1)
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}
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pathA, pathB := args[0], args[1]
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if err := run(pathA, pathB); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(-1)
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}
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}
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func run(pathA, pathB string) error {
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fileA, err := ioutil.ReadFile(pathA)
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if err != nil {
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return err
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}
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benchA, err := bench.Parse(string(fileA))
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if err != nil {
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return err
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}
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fileB, err := ioutil.ReadFile(pathB)
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if err != nil {
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return err
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}
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benchB, err := bench.Parse(string(fileB))
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if err != nil {
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return err
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}
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cmp := bench.Compare(benchA.Benchmarks, benchB.Benchmarks, *minDiff, *minRelDiff)
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diff := cmp.Format(bench.DiffFormat{
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TestName: true,
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Delta: true,
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PercentChangeAB: true,
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TimeA: true,
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TimeB: true,
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})
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fmt.Println("A:", pathA, " B:", pathB)
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fmt.Println()
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fmt.Println(diff)
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return nil
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}
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func fileName(path string) string {
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_, name := filepath.Split(path)
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return name
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}
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