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1765e20 · Apr 17, 2023

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Performance test of JavaScript iterations

We have few techniques to iterate over the arrays, objects and strings.

Tested the each technique with 1 Million iterations and executed the test.js file for 5 times using the for i in {1..5}; node test.js; command.

Results

  • While loop - 1.4ms
  • Do while loop - 0.8ms
  • For loop - 0.8ms
  • For Of loop - 9.5ms
  • For In loop - 137ms
  • Map method - 8.5ms
  • Filter method - 7.2ms
  • Reduce method - 6.4ms
  • Sort method - 11.7ms
  • Every method - 7.2ms
  • Some method - 6.8ms
  • Chaining methods - 16.3ms