var arr = Array.from({length: 10000}).map(x => 1);

{"ScriptPreparationCode":null,"TestCases":[{"Name":"Array.prototype.concat","Code":"var params = [ \u0022hello\u0022, true, 7 ];\r\nvar other = arr.concat(params);","IsDeferred":false},{"Name":"spread operator","Code":"var params = [ \u0022hello\u0022, true, 7 ]\r\nvar other = [ ...arr, ...params ]","IsDeferred":false},{"Name":"Push","Code":"var params = [ \u0022hello\u0022, true, 7 ];\r\nvar other = arr.push(...params);","IsDeferred":false}]}