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Run results for: Map vs Map vs Foreach vs for

Is it faster to store the return value of the map function in a new variable or to overwrite the existing array? Or is it faster to use forEach?

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Chrome 56
Mac OS X 10.12.3
Other
7 years ago
Test name Executions per second
Overwrite 10965.0 Ops/sec
Dont overwrite 11147.7 Ops/sec
forEach 71709.3 Ops/sec
for 6103.3 Ops/sec
Website performance monitoring
Script Preparation code:
Tests:

  • Overwrite

  • Dont overwrite

  • forEach

  • for