Benchmark: Passing existing array vs spreading twice

Script Preparation code:

data = [...Array(1000).keys()]

Tests:

Passing array directly to second function
function first(...data){ const res = data.map((n)=> parseInt(n)) return second(res) } function second(data){ const reducer = (acc, n)=> acc + n return data.reduce(reducer, 0) } first(...data)
Spreading array an extra time
function first(...data){ const res = data.map((n)=> parseInt(n)) return second(...res) } function second(...data){ const reducer = (acc, n)=> acc + n return data.reduce(reducer, 0) } first(...data)

Rendered benchmark preparation results:

Previous results

Test case name	Result
Passing array directly to second function
Spreading array an extra time

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0

Browser/OS: Firefox 91 on Windows

Test name	Executions per second
Passing array directly to second function	24997.5 Ops/sec
Spreading array an extra time	23085.1 Ops/sec

Passing existing array vs spreading twice (version: 0)