Repository navigation
Warn about unnecessary heap allocations #6145
Description
Activity
Nominating for maturity 5, production ready.
Very good, thanks.
Is the lint only for strings and vecs?
Yes, it only warns about string and vector literals at the moment, but I do plan to extend the lint to cover more cases.
- added a commit that references this issue
on May 27, 2013 - added a commit that references this issue
on Oct 9, 2020 - added 2 commits that reference this issue
on Aug 21, 2026
Per https://mail.mozilla.org/pipermail/rust-dev/2013-April/003867.html these are unnecessarily inefficient:
More generally, whenever a heap literal (
~valueor@value) appears where a borrow is used, the compiler could warn. I'm not sure if want this to apply to all locals or only some (small ones? temporaries within expressions?).