Very slow validation after dynamicRef implementation, even with schemas which do not use dynamicRef other than in their metaschema #941
Description
We just started noticing that some tooling which is using this code hangs in 4.5.0:
import jsonschema
import ruamel.yaml
YAML = ruamel.yaml.YAML()
...
with open(fname, "r") as f:
self.config = YAML.load(f)
jsonschema.validate(
self.config, SCHEMA,
format_checker=jsonschema.draft7_format_checker)That seems to hang and there are no warnings or errors. When we drop back to jsonschema<4.5.0 (so 4.4.0) it works. I'm not sure what might be going on here or how to debug.