mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
9f94c295ab
The ioutil.{Read|Write}File is deprecated since Go1.16 -
see https://tip.golang.org/doc/go1.16#ioutil
VictoriaMetrics needs at least Go1.18, so it is safe to remove ioutil usage
from source code.
This is a follow-up for 02ca2342ab
53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
package fs
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import (
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"fmt"
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"os"
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"testing"
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)
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func BenchmarkReaderAtMustReadAt(b *testing.B) {
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b.Run("mmap_on", func(b *testing.B) {
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benchmarkReaderAtMustReadAt(b, true)
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})
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b.Run("mmap_off", func(b *testing.B) {
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benchmarkReaderAtMustReadAt(b, false)
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})
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}
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func benchmarkReaderAtMustReadAt(b *testing.B, isMmap bool) {
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prevDisableMmap := *disableMmap
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*disableMmap = !isMmap
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defer func() {
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*disableMmap = prevDisableMmap
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}()
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path := "BenchmarkReaderAtMustReadAt"
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const fileSize = 8 * 1024 * 1024
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data := make([]byte, fileSize)
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if err := os.WriteFile(path, data, 0600); err != nil {
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b.Fatalf("cannot create %q: %s", path, err)
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}
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defer MustRemoveAll(path)
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r := MustOpenReaderAt(path)
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defer r.MustClose()
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b.ResetTimer()
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for _, bufSize := range []int{1, 1e1, 1e2, 1e3, 1e4, 1e5} {
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b.Run(fmt.Sprintf("%d", bufSize), func(b *testing.B) {
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b.ReportAllocs()
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b.SetBytes(int64(bufSize))
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b.RunParallel(func(pb *testing.PB) {
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buf := make([]byte, bufSize)
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var offset int64
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for pb.Next() {
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if len(buf)+int(offset) > fileSize {
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offset = 0
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}
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r.MustReadAt(buf, offset)
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offset += int64(len(buf))
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}
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})
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})
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}
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}
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