Benchmark: string += vs array joining vs template strings [v2]

Script Preparation code:

var str, strarr
var chars = 'abcdefghijklmnoprstuwxyz'

Tests:

+=
str = '' while (str.length < 100) str += chars[ Math.floor( Math.random() * chars.length ) ]
array joining
strarr = [] while (strarr.length < 100) strarr.push(chars[ Math.floor( Math.random() * chars.length ) ]) str = strarr.join('')
template strings
str = '' while (str.length < 100) str = `${str}${chars[ Math.floor( Math.random() * chars.length ) ]}`

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.142 Safari/537.36

Browser/OS: Chrome 81 on Windows

string += vs array joining vs template strings [v2] (version: 0)