Which loop is more faster for vector

Question

Hello

We have three option to iterate vector as per below code :

Range based loop is always good as it access same elements due to auto and reference. If index is required , then we choose index based where as iterator based is best suited in which case ? Does index based faster than iterator based ?
https://code.sololearn.com/cge5J0VCi77s/?ref=app

Answer 1

It depends on the compiler and machine that you use. They all have a significant application at different times.

Answer 2

Sharique does it really depend on compiler nd machine ??

Answer 3

It depends on your Compiler...