(b *testing.B)
| 29 | } |
| 30 | |
| 31 | func BenchmarkCopyZeroAllocBytesBufferToOSFile(b *testing.B) { |
| 32 | f, err := os.Open("./README.md") |
| 33 | if err != nil { |
| 34 | b.Fatal(err) |
| 35 | } |
| 36 | defer f.Close() |
| 37 | |
| 38 | buf := &bytes.Buffer{} |
| 39 | _, err = io.Copy(buf, f) |
| 40 | if err != nil { |
| 41 | b.Fatal(err) |
| 42 | } |
| 43 | |
| 44 | tmp, err := os.CreateTemp(os.TempDir(), "test_*") |
| 45 | if err != nil { |
| 46 | b.Fatal(err) |
| 47 | } |
| 48 | defer os.Remove(tmp.Name()) |
| 49 | |
| 50 | w, err := os.OpenFile(tmp.Name(), os.O_WRONLY, 0o444) |
| 51 | if err != nil { |
| 52 | b.Fatal(err) |
| 53 | } |
| 54 | defer w.Close() |
| 55 | |
| 56 | b.ResetTimer() |
| 57 | for i := 0; i < b.N; i++ { |
| 58 | _, err := w.Seek(0, 0) |
| 59 | if err != nil { |
| 60 | b.Fatal(err) |
| 61 | } |
| 62 | _, err = copyZeroAlloc(w, buf) |
| 63 | if err != nil { |
| 64 | b.Fatal(err) |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | func BenchmarkCopyZeroAllocOSFileToStringsBuilder(b *testing.B) { |
| 70 | r, err := os.Open("./README.md") |
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