benchmark: add text-encoder benchmark

PR-URL: #45450 Reviewed-By: Stephen Belanger <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>

Author: anonrig

benchmark/util/text-encoder.js

@@ -0,0 +1,32 @@
+'use strict';
+
+constcommon=require('../common.js');
+
+constBASE='string\ud801';
+
+constbench=common.createBenchmark(main,{
+len: [256,1024,1024*32],
+n: [1e4],
+op: ['encode','encodeInto']
+});
+
+functionmain({ n, op, len }){
+constencoder=newTextEncoder();
+constinput=BASE.repeat(len);
+constsubarray=newUint8Array(len);
+
+bench.start();
+switch(op){
+case'encode': {
+for(leti=0;i<n;i++)
+encoder.encode(input);
+break;
+}
+case'encodeInto': {
+for(leti=0;i<n;i++)
+encoder.encodeInto(input,subarray);
+break;
+}
+}
+bench.end(n);
+}