Purpose of __gmpn_invert_limb?

Alexander Quilliam alexkquilliam at gmail.com
Sat Mar 10 14:41:45 UTC 2018

I've been in the process of profiling my code (using google perftools), and
I've noticed that a function called __gmpn_invert_limb has been taking more
than 18% of the CPU time of my code. What does this function do, and why is
it so expensive? Is there a way to cut back on its usage?

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