Benchmark: Copy and remove - MeasureThat.net

Tests:

slice + concat
const array = [18, 40, 83, 94, 58, 45, 90, 48, 84, 59, 24, 34, 36, 99, 84, 51, 14, 31, 79, 90, 43, 51, 56, 77, 95, 85, 10, 21, 60, 99, 58, 38, 16, 19, 55, 57, 63, 82, 9, 78, 15, 89, 50, 56, 29, 34, 69, 53, 87, 53, 29, 27, 88, 94, 46, 20, 88, 93, 47, 40, 22, 23, 2, 48, 24, 37, 18, 61, 91, 37, 95, 86, 14, 4, 11, 49, 96, 57, 93, 17, 60, 21, 2, 61, 16, 67, 5, 7, 93, 91, 73, 3, 91, 17, 55, 30, 3, 83, 24, 64]; const indexToRemove = Math.floor(Math.random() * 100); const copy = array.slice(0, indexToRemove).concat(array.slice(indexToRemove + 1))
spread + splice
const array = [18, 40, 83, 94, 58, 45, 90, 48, 84, 59, 24, 34, 36, 99, 84, 51, 14, 31, 79, 90, 43, 51, 56, 77, 95, 85, 10, 21, 60, 99, 58, 38, 16, 19, 55, 57, 63, 82, 9, 78, 15, 89, 50, 56, 29, 34, 69, 53, 87, 53, 29, 27, 88, 94, 46, 20, 88, 93, 47, 40, 22, 23, 2, 48, 24, 37, 18, 61, 91, 37, 95, 86, 14, 4, 11, 49, 96, 57, 93, 17, 60, 21, 2, 61, 16, 67, 5, 7, 93, 91, 73, 3, 91, 17, 55, 30, 3, 83, 24, 64] const indexToRemove = Math.floor(Math.random() * 100); const copy = [...array]; copy.splice(indexToRemove, 1);

Rendered benchmark preparation results:

Previous results

Test case name	Result
slice + concat
spread + splice

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Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (X11; CrOS x86_64 11021.81.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36

Browser/OS: Chrome 70 on Chrome OS 11021.81.0

Test name	Executions per second
slice + concat	1040948.0 Ops/sec
spread + splice	791120.0 Ops/sec

Copy and remove (version: 0)