Backport PR #62210 on branch 2.3.x (BUG: Fix Memory Leak in to_json)

[swt2c]

Backport PR #62210: BUG: Fix Memory Leak in to_json

[jorisvandenbossche]

Just to understand, how does this relate to #62253 ?

[swt2c]

Both PRs are required to fix the memory leaks. I did two separate backport PRs so it was clear each one was a backport of a different main PR, but if you'd prefer them both in the same backport PR, can do that too?

[Alvaro-Kothe]

Hi @jorisvandenbossche, they fix memory leaks in different types of datetime serializations.

This one fixes in the conversion of datetime to epoch, while the one in #62253 fixes in the conversion of datetime to iso string.

[WillAyd]

This lgtm. Pretty sure the pre-commit error is unrelated - @jorisvandenbossche can that be re-run?

[jorisvandenbossche]

Ah, sorry, I missed that there were two PRs to main

Pretty sure the pre-commit error is unrelated - @jorisvandenbossche can that be re-run?

Yeah, pre-commit.ci is timing out on 2.3.x, so just ignore this (we should maybe disable it to avoid the confusion)