Can the program performance be optimized?

[sky126]

Can the program performance be optimized? There are too many loops. Are the following two pieces of code repeated?

 for value in line-data {
    if x-domain-min > value.at(0) {
      x-domain-min = value.at(0)
    }
    if x-domain-max < value.at(0) {
      x-domain-max = value.at(0)
    }

    if y-domain-min > value.at(1) {
      y-domain-min = value.at(1)
    }
    if y-domain-max < value.at(1) {
      y-domain-max = value.at(1)
    }
  }

[johannes-wolf]

I hope it can be improved. The clipping algorithm is quite naive. If you can find any perf. Improvements, feel free to open a PR. Currently, I do not have the time to do it.

[sky126]

I've been looking at the code for a few days, but I still don't understand it very well.

[johannes-wolf]

I've added some minor performance improvements with #814.