JavaScript performance tips | Part 1 #shorts

Explanation:
• Each statement in a loop, including the for statement, is executed for each iteration of the loop.
• Statements or assignments that can be placed outside the loop will make the loop run faster.
• Bad code accesses the length property of an array each time the loop is iterated.
• Better code accesses the length property only once outside the loop and makes the loop run faster.

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[abhinavreddyboddu]

Reason:
For every iteration of the loop, the following condition is checked
( I < arr.length) i.e you are calculating the value of arr. Length once for every iteration as opposed to computing arr. Length only once and using the variable to compare

[Zuaa]

Array.length isn't calculated each time you access it, only when the array changes.

[alagurajmurugan]

This not make any changes in performance