High-Performance Empty array mode

Source: Internet
Author: User

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arr = [] with arr.length = 0 The performance of the direct operation length would be better. Because a new array is re-assigned to ARR, it will re-create a space in memory for an empty array, while Arr.length is directly manipulating the original array without opening up new space.

There's something wrong with that, I hope Daniel points out.

High-Performance Empty array mode

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