Benchmark: reduce concat vs flat vs concat spread

Script Preparation code:

var data = Array.from({length: 1000}, () => Array.from(Array(100).keys()));

Tests:

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser/OS: Chrome 80 on Windows

reduce concat vs flat vs concat spread (version: 1)