fixup: use primordials

Author: ronag

benchmark/buffers/buffer-write-string.js

@@ -3,10 +3,10 @@
 const common = require('../common.js');
 const bench = common.createBenchmark(main, {
   encoding: [
-    'utf8',
+    '', 'utf8', 'ascii', 'hex', 'utf16le', 'latin1',
   ],
-  args: [ '' ],
-  len: [1,8,16,32, 64],
+  args: [ '', 'offset', 'offset+length' ],
+  len: [2048],
   n: [1e6],
 });
 

lib/buffer.js

@@ -1109,10 +1109,10 @@ Buffer.prototype.write = function write(string, offset, length, encoding) {
   }
 
   const len = string.length;
-  if (len <= 32 && len <= length) {
+  if (len <= 16 && len <= length) {
     let n = 0;
     while (true) {
-      const code = string.charCodeAt(n);
+      const code = StringPrototypeCharCodeAt(string, n);
       if (code >= 128) {
         break;
       }