Performance Issue: memory and performance optimisation in point.h #434
Description
Point class: missing += / -= overloads and inefficient squared_length() implementation
There are two places in point.h which are implemented inefficently:
1. Missing operator+= and operator-=
This causes temp variables to be made, which hurts efficiency.
Overloading these will sovle this issue.
2. Inefficient squared norm calculation
Currently we are calling length() and then squaring the result to get squared norm. This is terrible because we calculate a squareroot only to square it again.
We can simply use eigen's method squaredNorm() which would make this much faster.
I am planning to address both of these issues in a pr.