src/v8/test/js-perf-test/Parsing/comments.js

// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

const iterations = 100;

new BenchmarkSuite('OneLineComment', [1000], [
  new Benchmark('OneLineComment', false, true, iterations, Run, OneLineCommentSetup)
]);

new BenchmarkSuite('OneLineComments', [1000], [
  new Benchmark('OneLineComments', false, true, iterations, Run, OneLineCommentsSetup)
]);

new BenchmarkSuite('MultiLineComment', [1000], [
  new Benchmark('MultiLineComment', false, true, iterations, Run, MultiLineCommentSetup)
]);

let code;

function OneLineCommentSetup() {
  code = "//" + " This is a comment... ".repeat(600);
  %FlattenString(code);
}

function OneLineCommentsSetup() {
  code = "// This is a comment.\n".repeat(600);
  %FlattenString(code);
}

function MultiLineCommentSetup() {
  code = "/*" + " This is a comment... ".repeat(600) + "*/";
  %FlattenString(code);
}

function Run() {
  if (code == undefined) {
    throw new Error("No test data");
  }
  eval(code);
}