Function benchFile

memsys/d256_test.go:223–263

(b *testing.B, sbufSize int64)

}

func benchFile(b *testing.B, sbufSize int64) {
	mem := &memsys.MMSA{Name: "gmem", MinPctFree: 50}
	mem.Init(0)
	defer mem.Terminate(false)

	// reset initial conditions
	cos.FreeMemToOS()

	file, err := os.CreateTemp("/tmp", "")
	if err != nil {
		b.Fatal(err)
	}
	n, _ := file.Write(make([]byte, largefil))
	if int64(n) != largefil {
		b.Fatal(n, largefil)
	}

	defer func() {
		file.Close()
		os.Remove(file.Name())
	}()

	slab, err := mem.GetSlab(sbufSize)
	cos.AssertNoErr(err)
	buf := slab.Alloc()
	defer slab.Free(buf)

	if int64(len(buf)) != sbufSize {
		b.Fatal(len(buf), sbufSize)
	}

	b.ResetTimer() // start timing it
	for i := 0; i < b.N; i++ {
		file.Seek(0, io.SeekStart)
		n, _ := io.CopyBuffer(io.Discard, file, buf)
		if n != largefil {
			b.Fatal(n, largefil)
		}
	}
	b.StopTimer() // wo/ defers
}