Disable runtime checking with configuration option (environment variable)

[FRidh]

We have a situation where we do a tremendous amount of calls and would prefer not to have the overhead of Pandera. Therefore we would like to be able to disable it altogether. I could not find an option for this yet.

Work-around I am thinking of for now is to wrap pa.check_types into a new decorator and have it listen to PANDERA_DISABLE_RUNTIME_CHECKING=1.

[cosmicBboy]

good idea! Yeah you can monkey patch check_types in the meantime, would welcome a PR! Would you mind creating a feature request for this? https://github.com/unionai-oss/pandera/issues/new?assignees=&labels=enhancement&template=feature_request.md&title=

[FRidh]

Done in #1081