countlines in go asm, v1

benchmark_test.go

@@ -0,0 +1,61 @@
+package countlines
+
+import (
+	"math/rand"
+	"testing"
+)
+
+type size struct {
+	name string
+	l    int
+}
+
+var sizes = []size{
+	{"32", 32},
+	{"128", 128},
+	{"1K", 1 * 1024},
+	{"16K", 16 * 1024},
+	{"128K", 128 * 1024},
+	{"1M", 1024 * 1024},
+	{"16M", 16 * 1024 * 1024},
+	{"128M", 128 * 1024 * 1024},
+	{"512M", 512 * 1024 * 1024},
+}
+
+func randRead64(s []uint64) {
+	for i := range s {
+		s[i] = uint64(rand.Int63())
+	}
+}
+
+func BenchmarkCountNewlines(b *testing.B) {
+	for _, size := range sizes {
+		b.Run(size.name, func(b *testing.B) {
+			s := make([]byte, size.l)
+			rand.Read(s)
+
+			b.SetBytes(int64(size.l))
+			b.ResetTimer()
+
+			for i := 0; i < b.N; i++ {
+				CountNewlines(s)
+			}
+		})
+	}
+}
+
+func BenchmarkCountNewlinesGo(b *testing.B) {
+	for _, size := range sizes {
+		b.Run(size.name, func(b *testing.B) {
+			s := make([]byte, size.l)
+			rand.Read(s)
+
+			b.SetBytes(int64(size.l))
+			b.ResetTimer()
+
+			for i := 0; i < b.N; i++ {
+				countNewlinesGo(s)
+			}
+		})
+	}
+}