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const MAX = 10000;
var arr = [];
var str = "";
for (var i = 0; i < MAX; ++i) {
/x/.test(str);
str = str + 'xxxxxxxxxxxxxx';
arr.push(str);
}
arr.length = Math.floor(MAX/3);
gc();
for (var i = 0; i < MAX; ++i) {
/x/.test(arr[i]);
}