优化 textrank

util/helper/helper.go

@@ -0,0 +1,21 @@
+package helper
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// BytesToString 没有内存开销的转换
+func BytesToString(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
+
+// StringToBytes 没有内存开销的转换
+func StringToBytes(s string) (b []byte) {
+	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
+	bh.Data = sh.Data
+	bh.Len = sh.Len
+	bh.Cap = sh.Len
+	return b
+}