fixup

Author: ronag

benchmark/buffers/buffer-write-string.js

@@ -3,10 +3,10 @@
 const common = require('../common.js');
 const bench = common.createBenchmark(main, {
   encoding: [
-    '', 'utf8', 'ascii', 'hex', 'utf16le', 'latin1',
+    '',
   ],
-  args: [ '', 'offset', 'offset+length' ],
-  len: [2048],
+  args: [ '' ],
+  len: [1,8,16,32,128],
   n: [1e6],
 });
 

lib/buffer.js

@@ -1082,10 +1082,9 @@ function _fill(buf, value, offset, end, encoding) {
 Buffer.prototype.write = function write(string, offset, length, encoding) {
   // Buffer#write(string);
   if (offset === undefined) {
-    return this.utf8Write(string, 0, this.length);
-  }
+    // Do nothing
   // Buffer#write(string, encoding)
-  if (length === undefined && typeof offset === 'string') {
+  } else if (length === undefined && typeof offset === 'string') {
     encoding = offset;
     length = this.length;
     offset = 0;
@@ -1109,15 +1108,16 @@ Buffer.prototype.write = function write(string, offset, length, encoding) {
   }
 
   const len = string.length;
-  if (len <= 16 && len <= length) {
+  if (len <= 16 && len <= length && (!encoding || encoding === 'ascii' || encoding === 'utf8')) {
     let n = 0;
+    let pos = offset ?? 0;
     while (true) {
       const code = StringPrototypeCharCodeAt(string, n);
       if (code >= 128) {
         break;
       }
 
-      this[offset + n] = code;
+      this[pos + n] = code;
       n++;
 
       if (n === len) {