Benchmark: array vs object access

Script Preparation code:

var arr = new Array(1000).fill(0);

Tests:

test object accessor
for(const key in arr);
test array indexer
for(const idx of arr);
test object accessor + gets after
for(const key in arr); let i = 1000; while(arr[--i]);
test array indexer + gets after
for(const idx of arr); let i = 1000; while(arr[--i]);

Rendered benchmark preparation results:

Previous results

Test case name	Result
test object accessor
test array indexer
test object accessor + gets after
test array indexer + gets after

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Browser/OS: Chrome 96 on Windows

Test name	Executions per second
test object accessor	34637.1 Ops/sec
test array indexer	1028673.0 Ops/sec
test object accessor + gets after	35443.5 Ops/sec
test array indexer + gets after	914748.7 Ops/sec

array vs object access (version: 0)