[Exclamation] The `protovalidate-python` still extremely slow

[o-murphy]

Relative to productivity issues deacribed at #382
Just wanna give you extra bench results.

validator	speed, it/s	time, s	avg, s/it
protovalidate-python	19.69	24.74	0.0508
yupy (self-written)	1771.27	0.27	0.0005
my old dumb validator	228.70	2.13	0.0043
pure python jsonschema	-	1.3078	0.0027
fastjsonschema	-	0.0561	0.000115

[anuraaga]

Hi @o-murphy - I have just sent #485 to add a native matching engine that improves performance quite a bit. Hope to land that soon and think it will help here.