Improve performance of json.loads and json.load for numeric data

[eendebakpt]

Feature or enhancement

Proposal:

We can improve performance by adding fast paths for the common cases (ints with < 20 digits, floats with < 64 digits).

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-150638: Improve performance of json.loads and json.load for numeric data #150639