mirror of
https://github.com/astral-sh/ruff.git
synced 2025-10-31 20:08:19 +00:00
c9dff5c7d5
## Summary Garbage collect ASTs once we are done checking a given file. Queries with a cross-file dependency on the AST will reparse the file on demand. This reduces ty's peak memory usage by ~20-30%. The primary change of this PR is adding a `node_index` field to every AST node, that is assigned by the parser. `ParsedModule` can use this to create a flat index of AST nodes any time the file is parsed (or reparsed). This allows `AstNodeRef` to simply index into the current instance of the `ParsedModule`, instead of storing a pointer directly. The indices are somewhat hackily (using an atomic integer) assigned by the `parsed_module` query instead of by the parser directly. Assigning the indices in source-order in the (recursive) parser turns out to be difficult, and collecting the nodes during semantic indexing is impossible as `SemanticIndex` does not hold onto a specific `ParsedModuleRef`, which the pointers in the flat AST are tied to. This means that we have to do an extra AST traversal to assign and collect the nodes into a flat index, but the small performance impact (~3% on cold runs) seems worth it for the memory savings. Part of https://github.com/astral-sh/ty/issues/214.
66 lines
1.9 KiB
Text
66 lines
1.9 KiB
Text
---
|
|
source: crates/ruff_python_parser/tests/fixtures.rs
|
|
input_file: crates/ruff_python_parser/resources/valid/other/atom.py
|
|
---
|
|
## AST
|
|
|
|
```
|
|
Module(
|
|
ModModule {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 0..73,
|
|
body: [
|
|
Expr(
|
|
StmtExpr {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 0..3,
|
|
value: EllipsisLiteral(
|
|
ExprEllipsisLiteral {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 0..3,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Expr(
|
|
StmtExpr {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 4..8,
|
|
value: BooleanLiteral(
|
|
ExprBooleanLiteral {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 4..8,
|
|
value: true,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Expr(
|
|
StmtExpr {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 9..14,
|
|
value: BooleanLiteral(
|
|
ExprBooleanLiteral {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 9..14,
|
|
value: false,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Expr(
|
|
StmtExpr {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 15..19,
|
|
value: NoneLiteral(
|
|
ExprNoneLiteral {
|
|
node_index: AtomicNodeIndex(..),
|
|
range: 15..19,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
],
|
|
},
|
|
)
|
|
```
|