wp

util/io_test.go

@@ -0,0 +1,21 @@
+package util
+
+import (
+	"hash/crc32"
+	"testing"
+)
+
+var page = make([]byte, 4096)
+var ieeeTable = crc32.MakeTable(crc32.IEEE)
+
+func BenchmarkCRC32C(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		crc32.Checksum(page, castagnoliTable)
+	}
+}
+
+func BenchmarkCRC32IEEE(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		crc32.Checksum(page, ieeeTable)
+	}
+}

util/until.go

@@ -0,0 +1,17 @@
+package util
+
+import (
+	"hash/crc32"
+)
+
+var (
+	castagnoliTable = crc32.MakeTable(crc32.Castagnoli)
+)
+
+func CalcChecksum(page []byte) uint32 {
+	return crc32.Checksum(page, castagnoliTable)
+}
+
+func IsValidChecksum(page []byte, checksum uint32) bool {
+	return crc32.Checksum(page, castagnoliTable) == checksum
+}