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

Objects/codeobject.c の intern_constants から始め、should_intern_string が現在どのように文字列を intern するかどうかを判断しているかを追跡してください。開始前にリンクされている PR gh-140688 を確認し、既存の intern 済みの同値な文字列が再利用され、重複する等しい文字列が保持されなくなった時点で作業完了としてください。