Benchmark: Testing for false vs === undefined vs hasOwnProperty vs in for undefined member

Tests:

test truth
var n = {}; while(true) { if(!n.foo) break; }
test undefined
var n = {}; while(true) { if(n.foo===undefined) break; }
test hasOwnProperty
var n = {}; while(true) { if(!n.hasOwnProperty('foo')) break; }
test in ===
var n = {}; while(true) { if('foo' in n === false) break; }
test in !
var n = {}; while(true) { if(!('foo' in n)) break; }

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Windows

Testing for false vs === undefined vs hasOwnProperty vs in for undefined member (version: 0)