buffer: optimize for common encodings

ronag · targos · commit f7f7b0c4988c · 2024-08-14T08:37:04.000+02:00
PR-URL: #54319 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Bryan English <bryan@bryanenglish.com>
diff --git a/lib/buffer.js b/lib/buffer.js
@@ -1108,8 +1108,10 @@ Buffer.prototype.write = function write(string, offset, length, encoding) {
     }
   }
 
-  if (!encoding)
+  if (!encoding || encoding === 'utf8')
     return this.utf8Write(string, offset, length);
+  if (encoding === 'ascii')
+    return this.asciiWrite(string, offset, length);
 
   const ops = getEncodingOps(encoding);
   if (ops === undefined)

Original file line number	Diff line number	Diff line change
`@@ -1108,8 +1108,10 @@ Buffer.prototype.write = function write(string, offset, length, encoding) {`
`1108`	`1108`	`}`
`1109`	`1109`	`}`
`1110`	`1110`
`1111`		`- if (!encoding)`
	`1111`	`+ if (!encoding \|\| encoding === 'utf8')`
`1112`	`1112`	`return this.utf8Write(string, offset, length);`
	`1113`	`+ if (encoding === 'ascii')`
	`1114`	`+ return this.asciiWrite(string, offset, length);`
`1113`	`1115`
`1114`	`1116`	`const ops = getEncodingOps(encoding);`
`1115`	`1117`	`if (ops === undefined)`