Using spread on the accumulator in a `reduce` method

Benchmark created on

Setup

const arr = Array.from(Array(100).keys())

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Testing in
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Using the spread operator
arr.reduce(
  (acc, key) => ({
  	...acc,
  	[key]: key,
  }),
  {}
);
ready
Mutating the accumulator directly
arr.reduce(
  (acc, key) => {
  	acc[key] = key;
  	return acc;
  },
  {}
);
ready

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