The compiler team had our weekly triage meeting on 2019-10-24. You can find the minutes on the compiler-team repository. Each week, we have general announcements from the team followed by check-ins from two fo the compiler team working groups.

Announcements

• @simulacrum landed the rust-std split PR which decreases the size of the rustc-dev rustup component #65474

Working group sync

wg-nll

• Rust 1.40 (current nightly) will be the first stable release without the HIR borrow checker. This means Non Lexical Lifetimes will be available on Rust 2015.

• At this point, wg-nll has completed its purpose and will be disbanded.

  • wg-polonius is still going strong though!

Link to full discussion

wg-parallel-rustc

• Work is proceeding slowly but steadily. There are regular triage meetings every Monday on the compiler calendar.

• The current goal is to refactor/audit compiler locks and other parts of the parallel query system and to investigate improving performance.

• The current MVP is to do high-level parallelization in a few critical places such as typechecking & linting.

• Currently, we're not seeing the speedups we want from parallelization but work is ongoing to remove locking and improve the jobserver integration.

• Video recording of last meeting

Link to full discussion