Improving performance: aka To-Do for Performance

[dalisoft]

Here i wanna to make this project as fast as possible, for creating plug-in for my project.

To-Do's:

• [x] 1. Converting Curves to Lines, solution here
• [x] 2. Point-A-Long replacement to direct interpolation (improves by 5-15% performance)
• [x] 3. distance replacement to direct Math.sqrt (improves 5%)
• [ ] 4. Implementing the change of index
• [x] 5. Implementing the config for disabling topology/split into parts, as this costs at perf

Total performance improvements: 1 (5-50%) + 2 (5-15%) + 3 (5%) = 15%-70% improvements

And some others, that may i change in future

[veltman]

Feel free to submit a PR!