Run results for: js splice v toSpliced improved

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
splice-1	7344615.5 Ops/sec
splice-2	7392712.0 Ops/sec
splice-3	7382164.0 Ops/sec
toSpliced-1	6513610.5 Ops/sec
toSpliced-2	1036630.1 Ops/sec
toSpliced-3	2315.9 Ops/sec
splice-3 add items	2494.3 Ops/sec
splice-3 remove	2490.0 Ops/sec
toSpliced-3 add	3472.7 Ops/sec
toSpliced-3 remove	3537.9 Ops/sec

Script Preparation code:

function randomArray(e) {    
    e = e || 32;
    var t = "ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678",
    a = t.length,
    n = [];
    for (i = 0; i < e; i++) n.push(t.charAt(Math.floor(Math.random() * a)));
    return n
}
var arr1 = randomArray(100)
var arr2 = randomArray(10000)
var arr3 = randomArray(1000000)

Tests:

splice-1
var result1 = arr1.splice(Math.floor(arr1.length / 2), 1, "i")
splice-2
var result1 = arr2.splice(Math.floor(arr2.length / 2), 1, "i")
splice-3
var result1 = arr3.splice(Math.floor(arr3.length / 2), 1, "i")
toSpliced-1
var result1 = arr1.toSpliced(Math.floor(arr1.length / 2), 1, "i")
toSpliced-2
var result1 = arr2.toSpliced(Math.floor(arr2.length / 2), 1, "i")
toSpliced-3
var result1 = arr3.toSpliced(Math.floor(arr3.length / 2), 1, "i")
splice-3 add items
var result1 = arr3.splice(Math.floor(arr3.length / 2), 1, "i", "2")
splice-3 remove
var result1 = arr3.splice(Math.floor(arr3.length / 2), 1)
toSpliced-3 add
var result1 = arr3.toSpliced(Math.floor(arr3.length / 2), 1, "i", "d")
toSpliced-3 remove
var result1 = arr3.toSpliced(Math.floor(arr3.length / 2), 1)

Run results for: js splice v toSpliced improved

show splice v toSpliced performance

splice-1

splice-2

splice-3

toSpliced-1

toSpliced-2

toSpliced-3

splice-3 add items

splice-3 remove

toSpliced-3 add

toSpliced-3 remove