Copying data 2; mapping vs. spreading then modifying vs. Object.assign then modifiying

one month ago
User agent: Mozilla/5.0 (Linux; Android 12; Pixel 4a (5G)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Mobile Safari/537.36
Test name Executions per second
Mapping 541263.8 Ops/sec
spreading, then modifying 650415.3 Ops/sec
Object.assign, then modifying 159075.0 Ops/sec
Script Preparation code:
Tests:
  • Mapping

  • spreading, then modifying

  • Object.assign, then modifying

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