Use interned versions of string constants if they're already present

Feature or enhancement

Proposal:

For now intern_constants function in Objects/codeobject.c uses should_intern_string to check if that string should be interned. And do nothing if should_intern_string returned 0. Maybe it'll be better to check if this string already have interned variant and use it if present? Because there's no need to keep equal strings in memory. The small downside is some time needed for this checking.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-140688

Beginne in Objects/codeobject.c bei intern_constants und verfolge, wie should_intern_string derzeit bestimmt, ob Strings interniert werden. Prüfe den verlinkten PR gh-140688, bevor du beginnst, und betrachte die Arbeit als abgeschlossen, wenn vorhandene internierte Äquivalente wiederverwendet werden, ohne doppelte gleiche Strings beizubehalten.