Java for loop vs. while loop. Performance difference?

Question

Assume i have the following code, there are three for loop to do something. Would it run fast if i change the most outer for loop to while loop? thanks~~

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Answer 1

This kind of micro-optimization is pointless.

• A while-loop won’t be faster.
• The loop structure is not your bottleneck.
• Optimize your algorithm first.
• Better yet, don’t optimize first. Only optimize after you have found out that you really have a bottleneck in your algorithm that is not I/O-dependant.