If MathJax were available, the author of this question might have been able to describe what the code was trying to accomplish:

• Improve performance of math function applied to arrays

Also, if a reviewer chooses to overhaul the code, it would also be helpful to write an explanation using MathJax.

If MathJax were available, the author of this question might have been able to describe what the code was trying to accomplish:

• Improve performance of math function applied to arrays

Also, if a reviewer chooses to overhaul the code, it would also be helpful to write an explanation using MathJax.