diff options
Diffstat (limited to 'libgo/go/compress/lzw/reader_test.go')
-rw-r--r-- | libgo/go/compress/lzw/reader_test.go | 61 |
1 files changed, 29 insertions, 32 deletions
diff --git a/libgo/go/compress/lzw/reader_test.go b/libgo/go/compress/lzw/reader_test.go index c3a5c3a0aa..6b9f9a3da7 100644 --- a/libgo/go/compress/lzw/reader_test.go +++ b/libgo/go/compress/lzw/reader_test.go @@ -6,8 +6,10 @@ package lzw import ( "bytes" + "fmt" "io" "io/ioutil" + "math" "runtime" "strconv" "strings" @@ -118,42 +120,37 @@ func TestReader(t *testing.T) { } } -func benchmarkDecoder(b *testing.B, n int) { - b.StopTimer() - b.SetBytes(int64(n)) - buf0, err := ioutil.ReadFile("../testdata/e.txt") +func BenchmarkDecoder(b *testing.B) { + buf, err := ioutil.ReadFile("../testdata/e.txt") if err != nil { b.Fatal(err) } - if len(buf0) == 0 { + if len(buf) == 0 { b.Fatalf("test file has no data") } - compressed := new(bytes.Buffer) - w := NewWriter(compressed, LSB, 8) - for i := 0; i < n; i += len(buf0) { - if len(buf0) > n-i { - buf0 = buf0[:n-i] - } - w.Write(buf0) - } - w.Close() - buf1 := compressed.Bytes() - buf0, compressed, w = nil, nil, nil - runtime.GC() - b.StartTimer() - for i := 0; i < b.N; i++ { - io.Copy(ioutil.Discard, NewReader(bytes.NewReader(buf1), LSB, 8)) - } -} - -func BenchmarkDecoder1e4(b *testing.B) { - benchmarkDecoder(b, 1e4) -} -func BenchmarkDecoder1e5(b *testing.B) { - benchmarkDecoder(b, 1e5) -} - -func BenchmarkDecoder1e6(b *testing.B) { - benchmarkDecoder(b, 1e6) + for e := 4; e <= 6; e++ { + n := int(math.Pow10(e)) + b.Run(fmt.Sprint("1e", e), func(b *testing.B) { + b.StopTimer() + b.SetBytes(int64(n)) + buf0 := buf + compressed := new(bytes.Buffer) + w := NewWriter(compressed, LSB, 8) + for i := 0; i < n; i += len(buf0) { + if len(buf0) > n-i { + buf0 = buf0[:n-i] + } + w.Write(buf0) + } + w.Close() + buf1 := compressed.Bytes() + buf0, compressed, w = nil, nil, nil + runtime.GC() + b.StartTimer() + for i := 0; i < b.N; i++ { + io.Copy(ioutil.Discard, NewReader(bytes.NewReader(buf1), LSB, 8)) + } + }) + } } |