Here’s a tech I’ve learnt after playing pizza tower. (As Peppino:) I usually use one of his long jumps to traverse, although, most people use the slide mechanism. The fastest way to get to Mach 3 is using the short long jump, then a dive. It instantly gets to Mach 3 without any problems, and it’s quite faster than the slide tech.
Grabslide is faster. The grabslide goes at base Mach 3 speed with no acceleration, and once you let go, the you start accelerating. Throughout the whole process, you go at least at Mach 3 speed. For the long jump then dive, you go at Mach 2 until after the dive.