Move archive to pkg/archive

Signed-off-by: Derek McGowan <derek@mcg.dev>

pkg/archive/compression/benchmark_test.go

@@ -0,0 +1,80 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package compression
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os/exec"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+const benchmarkTestDataURL = "https://git.io/fADcl"
+
+func BenchmarkDecompression(b *testing.B) {
+	resp, err := http.Get(benchmarkTestDataURL)
+	require.NoError(b, err)
+
+	data, err := io.ReadAll(resp.Body)
+	require.NoError(b, err)
+	resp.Body.Close()
+
+	const mib = 1024 * 1024
+	sizes := []int{32, 64, 128, 256}
+
+	for _, sizeInMiB := range sizes {
+		size := sizeInMiB * mib
+		for len(data) < size {
+			data = append(data, data...)
+		}
+		data = data[0:size]
+
+		gz := testCompress(b, data, Gzip)
+		zstd := testCompress(b, data, Zstd)
+
+		b.Run(fmt.Sprintf("size=%dMiB", sizeInMiB), func(b *testing.B) {
+			original := gzipPath
+			defer func() {
+				gzipPath = original
+			}()
+
+			b.Run("zstd", func(b *testing.B) {
+				testDecompress(b, zstd)
+			})
+
+			gzipPath = ""
+			b.Run("gzipPureGo", func(b *testing.B) {
+				testDecompress(b, gz)
+			})
+			gzipPath, err = exec.LookPath("igzip")
+			if err == nil {
+				b.Run("igzip", func(b *testing.B) {
+					testDecompress(b, gz)
+				})
+			}
+			gzipPath, err = exec.LookPath("unpigz")
+			if err == nil {
+				b.Run("unpigz", func(b *testing.B) {
+					testDecompress(b, gz)
+				})
+			}
+		})
+	}
+}