The same line search algorithm has inconsistent performance on different operating systems.

[frankwswang]

I noticed that the same line search algorithm from the package (combined with gradient descent) produced very different convergence results in different systems. Especially on Windows, the iteration converged much faster (in terms of number of steps) than on Linux sometimes. This issue looks concerning since I would like other people who use a different system than I can reproduce my result with the same code.