benchmark: add test_runner/mock-fn

PR-URL: #55771
Refs: #55723
Reviewed-By: Pietro Marchini <pietro.marchini94@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>

Author: avivkeller

benchmark/test_runner/mock-fn.js

@@ -0,0 +1,48 @@
+'use strict';
+
+constcommon=require('../common');
+constassert=require('node:assert');
+const{ test }=require('node:test');
+
+constbench=common.createBenchmark(main,{
+n: [1e6],
+mode: ['define','execute'],
+},{
+// We don't want to test the reporter here
+flags: ['--test-reporter=./benchmark/fixtures/empty-test-reporter.js'],
+});
+
+constnoop=()=>{};
+
+functionbenchmarkDefine(n){
+letnoDead;
+test((t)=>{
+bench.start();
+for(leti=0;i<n;i++){
+noDead=t.mock.fn(noop);
+}
+bench.end(n);
+assert.ok(noDead);
+});
+}
+
+functionbenchmarkExecute(n){
+letnoDead;
+test((t)=>{
+constmocked=t.mock.fn(noop);
+bench.start();
+for(leti=0;i<n;i++){
+noDead=mocked();
+}
+bench.end(n);
+assert.strictEqual(noDead,noop());
+});
+}
+
+functionmain({ n, mode }){
+if(mode==='define'){
+benchmarkDefine(n);
+}elseif(mode==='execute'){
+benchmarkExecute(n);
+}
+}