Compare the new ES6 spread operator with the traditional slice() method
let vs var for loop
the cached DOM fragment is to be added later (via appendChild -> very fast)
Test on isEqual performance
This benchmark compares some algorithms to check if there is an element from an array into another
New benchmark Your benchmarks
Source code: GitHub/MeasureThat.net
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Based on: Benchmark.js (v2.1.1)
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