MORE SPEEDTESTS: http://scratch.mit.edu/studios/795672/ ------- UPDATE: now tests drawing 15 times, to get better average. This speed-test demonstrates the performance hit caused by the circular dot that is drawn at "pen down" (and which then gets over-drawn as soon as you move the pen to draw a line). The performance hit can be reduced by setting the pen size to one before pen down, and then setting the pen size to what you want for the actual line(s). NOTE: You can get a better feel for the comparison by running it a few times, since the timings can be fairly variable. See this post: https://scratch.mit.edu/discuss/post/908898/ Also, see my posts further down this github issue: https://github.com/LLK/scratch-flash/issues/482
