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Box ImportPattern in Expr (#12568)

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# Description
Adds a `Box` around the `ImportPattern` in `Expr` which decreases the
size of `Expr` from 152 to 64 bytes (and `Expression` from 216 to 128
bytes). This seems to speed up parsing a little bit according to the
benchmarks (main is top, PR is bottom):
```
benchmarks                       fastest       │ slowest       │ median        │ mean          │ samples │ iters
benchmarks                       fastest       │ slowest       │ median        │ mean          │ samples │ iters
├─ parser_benchmarks                           │               │               │               │         │
├─ parser_benchmarks                           │               │               │               │         │
│  ├─ parse_default_config_file  2.287 ms      │ 4.532 ms      │ 2.311 ms      │ 2.437 ms      │ 100     │ 100
│  ├─ parse_default_config_file  2.255 ms      │ 2.781 ms      │ 2.281 ms      │ 2.312 ms      │ 100     │ 100
│  ╰─ parse_default_env_file     421.8 µs      │ 824.6 µs      │ 494.3 µs      │ 527.5 µs      │ 100     │ 100
│  ╰─ parse_default_env_file     402 µs        │ 486.6 µs      │ 414.8 µs      │ 416.2 µs      │ 100     │ 100

```
This commit is contained in:
Ian Manske
2024-04-18 15:57:01 +00:00
committed by GitHub
parent b088f395dc
commit 9a265847e2
4 changed files with 7 additions and 7 deletions
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2
crates/nu-protocol/src/ast/expr.rs
View File

@ -46,7 +46,7 @@ pub enum Expr {
String(String),
CellPath(CellPath),
FullCellPath(Box<FullCellPath>),
ImportPattern(ImportPattern),
ImportPattern(Box<ImportPattern>),
Overlay(Option<BlockId>), // block ID of the overlay's origin module
Signature(Box<Signature>),
StringInterpolation(Vec<Expression>),

2
crates/nu-protocol/src/ast/expression.rs
View File

@ -110,7 +110,7 @@ impl Expression {
pub fn as_import_pattern(&self) -> Option<ImportPattern> {
match &self.expr {
Expr::ImportPattern(pattern) => Some(pattern.clone()),
Expr::ImportPattern(pattern) => Some(*pattern.clone()),
_ => None,
}
}