are the compiled validation functions cached?

[renaud]

From the Python docs for re.compile():

Note The compiled versions of the most recent patterns passed to re.match(), 
re.search() or re.compile() are cached, so programs that use only a few regular 
expressions at a time needn’t worry about compiling regular expressions.

Is there such a mechanism in fastjsonschema?

[horejsek]

No, it is not in place. But it could be an interesting feature. Maybe in future. :-)

[horejsek]

Actually, I was wrong. Of course regexps are compiled.