For `mypy -c 'import torch'`, the cache load time goes from 0.44s to
0.25s as measured by manager's data_json_load_time
If I time dump times specifically, I see a saving of 0.65s to 0.07s.
Overall, a pretty reasonable perf win -- should we make it a required
dependency?

I don't know if the sqlite cache path is used at all, but let me know if
I need a cleverer migration than renaming the table

JukkaL pushed a commit that referenced this pull request

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For `mypy -c 'import torch'`, the cache load time goes from 0.44s to
0.25s as measured by manager's data_json_load_time. If I time dump times
specifically, I see a saving of 0.65s to 0.07s. Overall, a pretty
reasonable perf win -- should we make it a required dependency?

See also #3456