I use bullet rain drops to simulate rain, on collision with a line on the ground, it spawns a particle droplet, on collision with a water line, it spawn both a particle droplet as well as a ripple sprite.
Runs absolutely smooth even on weaker devices, ie. old Dual Core 1ghz from 2011. This is the same for CocoonJS OR Intel XDK/Crosswalk, both ran it very well, actually, Crosswalk is smoother!
Check out how graphically demanding and collision intense the game is:
So yes indeed, Construct 2 can generate very intensive games and thanks to the ever improving Chrome engine with Crosswalk, its smooth on many devices too.
ps. Also same for hailstones, on impact with the ground or other objects, spawns into multiple smaller stones. Bullet is quite efficient.