Cache or optimize triangulation data used for drawing with fill operation

[obiot]

the current Path2d triangulatePath() method : https://github.com/melonjs/melonJS/blob/bb2c02026eac131c74495b27349621e5fa3fb2fa/src/geometries/path2d.js#L55-L78 does not cache the generated data, forcing melonJS to recalculate every thing when using directly method like fillRect() and friends, and create a huge performance bottleneck.

For reference here below is an extract from a benchmark on fill operation for both rectangle and circle:

melonJS 15.0.0 (M1 Max)	Fill (rect)	Fill (circle)
500 op/s	60 fps	60 fps
1000 op/s	60 fps	32 fps
2500 op/s	35 fps	12 fps
5000 op/s	16 fps	6 fps
10000 op/s	6 fps	4 fps
15000 op/s	4 fps	3 fps

which shows performances dropping when drawing more than 1'000 shapes per frame.