Stealth Bastard Deluxe - The Teleporter Chambers X-4 Speed Run v2
Speed run of X-4 from Stealth Bastard Deluxe - The Teleporter Chambers. There is one mistake at 0:21 (which resulted in the 1 DEATH & 1 SPOTTED) but apart from that this is the run I used to set my current best time. Compared to the old run, the only difference is at 0:36 (use one throw less now) and 0:40 (use teleporter instead of running to exit) the rest of the speed difference is purely based on execution.
If you compare the old speedrun video to this one which was done in v1.64, the length difference is around 8s indicating the difference in performance after the game was ported to GameMaker Studio.