undefined vs. typeof vs. in vs. hasOwnProperty vs. obj[key] (version: 1)

Object lookup performance

Comparing performance of: undefined vs typeof vs in vs hasOwnProperty vs bool vs obj[key]

Created: one year ago by: Guest
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Script Preparation code:
Tests:
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results
  • Test case name Result
    undefined
    typeof
    in
    hasOwnProperty
    bool
    obj[key]

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: one year ago)
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 OPR/119.0.0.0
Opera 119 on Windows
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obj[key]
261.5M/s
typeof
254.2M/s
in
253.4M/s
bool
241.5M/s
undefined
239.1M/s
hasOwnProperty
159.8M/s
View exact numbers
Test name Executions per second
✓ obj[key] 261,477,408 Ops/sec
typeof 254,191,936 Ops/sec
in 253,378,608 Ops/sec
bool 241,523,968 Ops/sec
undefined 239,102,112 Ops/sec
hasOwnProperty 159,830,912 Ops/sec

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