{"ScriptPreparationCode":"var array = Array.from({ length: 100 }).map((val, i) =\u003E i);","TestCases":[{"Name":"Splice","Code":"var newArray = array.slice(0, 0, 99);","IsDeferred":false},{"Name":"Spread","Code":"var newArray = [99, ...array];","IsDeferred":false},{"Name":"Unshift","Code":"var newArray = array.unshift(99);","IsDeferred":false},{"Name":"manual","Code":"var len=array.length,\r\n item=99;\r\nwhile (len) { array[len] = array[len-1]; len--}\r\narray[0] = item;","IsDeferred":false}]}