Linux screenshot (scrot) performance improvement #89
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Improved performance for the pixel() function.
On a set of monitors, the screenshot was taking 400 ms, the solution to improve performance was instead of taking the screenshot of the entire screen and reading the pixel position, it was taking the screenshot already of a region and of only 1 pixel and so on improving the performance of the screenshot function by passing the region through the '-a' parameter of the 'scrot' command.