call keyfn _way_ less :runner:
call keyfn _way_ less :runner:

Dropps calls to keyfn for a data schema from 42238 to 470 calls on
sample data schema.

Approximately drops a call that takes 1.9 seconds to 0.154 seconds

dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq