sqrt optimization patch

[Codain]

Looking at the source code here is a patch which reduce the number of sqrt calls in some specific cases:
* Use of for/while loops with sqrt on constants data
* Use of the square root of a constant multiple times

+ some floating point divisions enhancements.

[Mc (mc...)]

Hi,

can you make a MR on gitlab with your changes ?
Also, there are a few tabs to get rid of, and I'm not sure I see the advantage of the
- something = stuff * ((a+b)/2)
+ mean = (a+b)/2
+ something= stuff*mean

or of the added dots in 2 → 2.

Thanks

[Qantas94Heavy (qantas94heavy)]

Closing as this has not had any response for over a year. If you still want your changes to be included, please create a merge request on GitLab: https://gitlab.com/inkscape/inkscape/merge_requests. Thanks!

Closed by: https://gitlab.com/Qantas94Heavy