Run results for: js splice v toSpliced improved

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
splice-1	3758490.8 Ops/sec
splice-2	3618269.8 Ops/sec
splice-3	3762439.5 Ops/sec
toSpliced-1	3089284.2 Ops/sec
toSpliced-2	194754.6 Ops/sec
toSpliced-3	448.6 Ops/sec
splice-3 add items	1251.2 Ops/sec
splice-3 remove	1758.3 Ops/sec
toSpliced-3 add	460.7 Ops/sec
toSpliced-3 remove	453.0 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