Performance improvements
Current blurlock is slow, following two suggestions reduces time from over 2 seconds to around 0.5 second
Similar blur:
convert -scale 10% -blur 0x0.5 -resize 1000% /tmp/screenshot.png /tmp/screenshotblur.png
More blur:
convert -scale 10% -blur 0x2.5 -resize 1000% /tmp/screenshot.png /tmp/screenshotblur.png