Benchmark: slice + concat vs splice

Tests:

immutable with concat
var a = [ "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello" ] var b = a.slice(0, 3).concat(a.slice(3 + 1));
direct mutation with splice + spread
var a = [ "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello" ] var b = a.splice(3, 1);

Rendered benchmark preparation results:

Previous results

Test case name	Result
immutable with concat
direct mutation with splice + spread

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Linux

Test name	Executions per second
immutable with concat	3627643.5 Ops/sec
direct mutation with splice + spread	6489217.0 Ops/sec

Related benchmarks:

slice + concat vs splice (version: 1)