2a584a8937
It will help for us to rename earlier vs later, and syscallfs will be laborious, especially after we introduce an FSConfig type and need to declare a method name that differentiates from normal fs.FS. e.g. WithFS vs WithSysFS reads nicer than WithSyscallFS, and meanwhile sys is already a public package. Signed-off-by: Adrian Cole <adrian@tetrate.io>
64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
package sysfs
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import (
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"io"
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"io/fs"
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"os"
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"testing"
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)
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func BenchmarkReaderAtOffset(b *testing.B) {
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dirFS := os.DirFS("testdata")
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embedFS, err := fs.Sub(readerAtFS, "testdata")
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if err != nil {
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b.Fatal(err)
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}
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benches := []struct {
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name string
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fs fs.FS
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ra bool
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}{
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{name: "os.DirFS io.File", fs: dirFS, ra: false},
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{name: "os.DirFS readerAtOffset", fs: dirFS, ra: true},
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{name: "embed.FS embed.file", fs: embedFS, ra: false},
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{name: "embed.FS seekToOffsetReader", fs: embedFS, ra: true},
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}
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buf := make([]byte, 3)
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for _, bc := range benches {
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bc := bc
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b.Run(bc.name, func(b *testing.B) {
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f, err := bc.fs.Open("wazero.txt")
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if err != nil {
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b.Fatal(err)
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}
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defer f.Close()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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b.StopTimer()
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// Reset the read position back to the beginning of the file.
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if _, err = f.(io.Seeker).Seek(0, io.SeekStart); err != nil {
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b.Fatal(err)
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}
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// Get the reader we are benchmarking
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var r io.Reader = f
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if bc.ra {
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r = ReaderAtOffset(f, 3)
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}
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b.StartTimer()
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if _, err := r.Read(buf); err != nil {
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b.Fatal(err)
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}
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b.StopTimer()
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}
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})
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}
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}
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