fixup! buffer: improve performance of buffer indexof method

ZYSzys · ZYSzys · commit 50acfb814a88 · 2019-03-08T14:28:27.000+08:00
diff --git a/lib/buffer.js b/lib/buffer.js
@@ -765,7 +765,7 @@ function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
   dir = !!dir;  // Cast to bool.
 
   if (typeof val === 'string') {
-    if (encoding === undefined) {
+    if (encoding === undefined || encoding === 'utf8') {
       return indexOfString(buffer, val, byteOffset, encoding, dir);
     }
     return slowIndexOf(buffer, val, byteOffset, encoding, dir);

Original file line number	Diff line number	Diff line change
`@@ -765,7 +765,7 @@ function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {`
`765`	`765`	`dir = !!dir; // Cast to bool.`
`766`	`766`
`767`	`767`	`if (typeof val === 'string') {`
`768`		`- if (encoding === undefined) {`
	`768`	`+ if (encoding === undefined \|\| encoding === 'utf8') {`
`769`	`769`	`return indexOfString(buffer, val, byteOffset, encoding, dir);`
`770`	`770`	`}`
`771`	`771`	`return slowIndexOf(buffer, val, byteOffset, encoding, dir);`