"use strict"; var bigString = "x"; while (bigString.length < 200000) bigString = bigString + bigString; if (bigString.length != 262144) throw "Error: bad string length: " + bigString.length; var result = /x/g[Symbol.match](bigString); if (result.length != 262144) throw "Error: bad result array length: " + result.length; for (var i = 0; i < result.length; ++i) { if (result[i] != "x") throw "Error: array does not contain \"x\" at i = " + i + ": " + result[i]; }