Benchmark: Array.at(-1) vs. Array.length - 1

Script Preparation code:

var LEN = 3000;
var arr = new Array(LEN).fill(0).map((_, i) => i);

Tests:

Rendered benchmark preparation results:

Previous results

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Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser/OS: Firefox 122 on Linux

Array.at(-1) vs. Array.length - 1 (version: 0)