compare filter methods on arrays that both modify objects and remove items from the array.

Compare loop performance

same as /Benchmarks/Show/22083/0/const-vs-let-vs-var-vs-sloppy but without bench of push (mem/cache/gc/etc)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Finding out the performance hit of array entries

Test different for loops

test for

var obj = { a:1, b:2, c:3, d: 4, e: 5, f: 6, g: 7 }

Comparing typeof vs instanceof vs .constructor property