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//go:build fsbench
package task_test
import (
"bytes"
"fmt"
"io"
"io/fs"
"os"
"path/filepath"
"testing"
"time"
"github.com/stretchr/testify/require"
"github.com/go-task/task/v3"
)
const (
manySmallFileCount = 20_000
smallFileSize = 5
fewLargeFileCount = 4
largeFileSize = 128 * 1024 * 1024
)
func BenchmarkManySmallFiles(b *testing.B) {
dir := b.TempDir()
createBenchmarkFixture(b, dir, manySmallFileCount, smallFileSize)
benchmarkModes(b, dir, manySmallFileCount, smallFileSize)
}
func BenchmarkFewLargeFiles(b *testing.B) {
dir := b.TempDir()
createBenchmarkFixture(b, dir, fewLargeFileCount, largeFileSize)
benchmarkModes(b, dir, fewLargeFileCount, largeFileSize)
}
func benchmarkModes(b *testing.B, dir string, fileCount int, fileSize int64) {
b.Helper()
for _, mode := range []struct {
name string
task string
expectCache bool
nativeMTime bool
}{
{name: "checksum", task: "checksum-yaml", expectCache: true},
{name: "timestamp", task: "timestamp-yaml", expectCache: true},
{name: "native-mtime", nativeMTime: true},
{name: "none", task: "uncached-yaml"},
} {
b.Run(mode.name, func(b *testing.B) {
if mode.nativeMTime {
benchmarkNativeMTime(b, dir, fileCount, fileSize)
return
}
benchmarkTask(b, dir, mode.task, mode.expectCache, fileCount, fileSize)
})
}
}
func benchmarkTask(
b *testing.B,
dir string,
taskName string,
expectCache bool,
fileCount int,
fileSize int64,
) {
b.Helper()
tempDir := task.TempDir{
Remote: filepath.Join(dir, ".task"),
Fingerprint: filepath.Join(dir, ".task"),
}
if expectCache {
e := task.NewExecutor(
task.WithDir(dir),
task.WithStdout(io.Discard),
task.WithStderr(io.Discard),
task.WithTempDir(tempDir),
)
require.NoError(b, e.Setup())
require.NoError(b, e.Run(b.Context(), &task.Call{Task: taskName}))
}
b.ReportAllocs()
sourceBytes := int64(fileCount) * fileSize
if expectCache {
b.SetBytes(sourceBytes)
}
b.ResetTimer()
for range b.N {
var buff bytes.Buffer
e := task.NewExecutor(
task.WithDir(dir),
task.WithStdout(&buff),
task.WithStderr(&buff),
task.WithTempDir(tempDir),
)
require.NoError(b, e.Setup())
require.NoError(b, e.Run(b.Context(), &task.Call{Task: taskName}))
if expectCache {
require.Contains(b, buff.String(), fmt.Sprintf(`Task "%s" is up to date`, taskName))
}
}
if expectCache {
b.ReportMetric(float64(fileCount), "source_files/op")
b.ReportMetric(float64(sourceBytes)/(1024*1024), "source_MiB/op")
}
}
func benchmarkNativeMTime(b *testing.B, dir string, fileCount int, fileSize int64) {
b.Helper()
output := filepath.Join(dir, "out", "native-mtime.txt")
require.NoError(b, os.WriteFile(output, []byte("ok"), 0o644))
outputTime := time.Now().Add(time.Second)
require.NoError(b, os.Chtimes(output, outputTime, outputTime))
sourceRoot := filepath.Join(dir, "path", "to", "folder")
sourceBytes := int64(fileCount) * fileSize
b.ReportAllocs()
b.SetBytes(sourceBytes)
b.ResetTimer()
for range b.N {
outputInfo, err := os.Stat(output)
require.NoError(b, err)
upToDate, err := nativeMTimeUpToDate(sourceRoot, outputInfo.ModTime())
require.NoError(b, err)
require.True(b, upToDate)
}
b.ReportMetric(float64(fileCount), "source_files/op")
b.ReportMetric(float64(sourceBytes)/(1024*1024), "source_MiB/op")
}
func nativeMTimeUpToDate(sourceRoot string, outputTime time.Time) (bool, error) {
upToDate := true
err := filepath.WalkDir(sourceRoot, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() || filepath.Ext(path) != ".yaml" {
return nil
}
info, err := d.Info()
if err != nil {
return err
}
if info.ModTime().After(outputTime) {
upToDate = false
return fs.SkipAll
}
return nil
})
return upToDate, err
}
func createBenchmarkFixture(tb testing.TB, dir string, fileCount int, fileSize int64) {
tb.Helper()
taskfile := `version: '3'
tasks:
checksum-yaml:
sources:
- path/to/folder/**/*.yaml
generates:
- out/checksum.txt
cmds:
- printf ok > out/checksum.txt
timestamp-yaml:
method: timestamp
sources:
- path/to/folder/**/*.yaml
generates:
- out/timestamp.txt
cmds:
- printf ok > out/timestamp.txt
uncached-yaml:
method: none
cmds:
- printf ok > out/uncached.txt
`
require.NoError(tb, os.WriteFile(filepath.Join(dir, "Taskfile.yml"), []byte(taskfile), 0o644))
require.NoError(tb, os.MkdirAll(filepath.Join(dir, "out"), 0o755))
for i := 1; i <= fileCount; i++ {
subdir := filepath.Join(dir, "path", "to", "folder", fmt.Sprintf("%04d", i/100))
require.NoError(tb, os.MkdirAll(subdir, 0o755))
name := filepath.Join(subdir, fmt.Sprintf("file-%05d.yaml", i))
createSparseFile(tb, name, fileSize)
}
}
func createSparseFile(tb testing.TB, name string, size int64) {
tb.Helper()
file, err := os.OpenFile(name, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o644)
require.NoError(tb, err)
defer func() {
require.NoError(tb, file.Close())
}()
require.NoError(tb, file.Truncate(size))
}