Benchmark: Object property check bool cast !! vs plain call

Script Preparation code:

killer = {killed: []}

Tests:

Bool cast !!
if (!!killer.killed) console.log(1); else console.log(2); if (!!killer.killedby) console.log(1); else console.log(2);
Plain call
if (killer.killed) console.log(1); else console.log(2); if (killer.killedby) console.log(1); else console.log(2);

Rendered benchmark preparation results:

Previous results

Test case name	Result
Bool cast !!
Plain call

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Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36

Browser/OS: Chrome 86 on Windows

Test name	Executions per second
Bool cast !!	27236.6 Ops/sec
Plain call	27545.0 Ops/sec

Object property check bool cast !! vs plain call (version: 0)