Repository navigation

Reduce memory usage for Path values with a single Ident, or where we can reconstruct the Span - #163744

Open

joshtriplett wants to merge 30 commits into

rust-lang:mainfrom

joshtriplett:path-unsegment

Commits on Oct 4, 2026
Commits on Oct 5, 2026
- Inline `Segment::from`
  joshtriplett
  committed
  ec9c4a6
- Add fast paths to `Segment::from_path`
  joshtriplett
  committed
  5a90626
- Remove redundant clones of attribute paths
  joshtriplett
  committed
  b66ab4e
- Remove redundant collections of attribute paths
  joshtriplett
  committed
  0e50314
- rustc_ast: Optimize `segments_span` and inline `.span()` helpers
  joshtriplett
  committed
  2e0dc19
- Use a `Path::Ident` for macro placeholder paths (which are never read)
  joshtriplett
  committed
  2bc0ff8
- Optimize `MacCall::span` to avoid combining spans repeatedly
  joshtriplett
  committed
  cd09dcb
- parse_path_inner: Add a fast path for common cases to avoid reconstructing a span
  joshtriplett
  committed
  83758aa
- lower_qpath: Only call `p.num_segments()` once
  joshtriplett
  committed
  7351815
- lower_qpath: Refactor to move loop computing `segments` earlier
  joshtriplett
  committed
  b9e395e
- lower_qpath: Compute the span when we encounter the last prefix segment
  joshtriplett
  committed
  a2bd244
- lower_qpath: Reuse the segment iterator rather than recreating it
  joshtriplett
  committed
  fde2661
- Fix clippy for changes to Path
  joshtriplett
  committed
  2c9b53f
- Fix rustfmt for changes to Path
  joshtriplett
  committed
  93bc654
Commits on Oct 6, 2026