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perf: reserve Vec capacities where appropriate

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(cherry picked from commit 1e7d77c517)
This commit is contained in:
Will Lillis 2025-07-07 21:56:42 -04:00
parent bf4217f0ff
commit d7529c3265
12 changed files with 32 additions and 25 deletions
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5
cli/src/fuzz/mod.rs
View file

@ -215,8 +215,9 @@ pub fn fuzz_language_corpus(
}
// Perform a random series of edits and reparse.
let mut undo_stack = Vec::new();
for _ in 0..=rand.unsigned(*EDIT_COUNT) {
let edit_count = rand.unsigned(*EDIT_COUNT);
let mut undo_stack = Vec::with_capacity(edit_count);
for _ in 0..=edit_count {
let edit = get_random_edit(&mut rand, &input);
undo_stack.push(invert_edit(&input, &edit));
perform_edit(&mut tree, &mut input, &edit).unwrap();

2
cli/src/fuzz/random.rs
View file

@ -20,8 +20,8 @@ impl Rand {
}
pub fn words(&mut self, max_count: usize) -> Vec<u8> {
let mut result = Vec::new();
let word_count = self.unsigned(max_count);
let mut result = Vec::with_capacity(2 * word_count);
for i in 0..word_count {
if i > 0 {
if self.unsigned(5) == 0 {

2
cli/src/highlight.rs
View file

@ -83,8 +83,8 @@ impl<'de> Deserialize<'de> for Theme {
let mut styles = Vec::new();
let mut highlight_names = Vec::new();
if let Ok(colors) = BTreeMap::<String, Value>::deserialize(deserializer) {
highlight_names.reserve(colors.len());
styles.reserve(colors.len());
highlight_names.reserve(colors.len());
for (name, style_value) in colors {
let mut style = Style::default();
parse_style(&mut style, style_value);

5
cli/src/tests/corpus_test.rs
View file

@ -243,8 +243,9 @@ pub fn test_language_corpus(
}
// Perform a random series of edits and reparse.
let mut undo_stack = Vec::new();
for _ in 0..=rand.unsigned(*EDIT_COUNT) {
let edit_count = rand.unsigned(*EDIT_COUNT);
let mut undo_stack = Vec::with_capacity(edit_count);
for _ in 0..=edit_count {
let edit = get_random_edit(&mut rand, &input);
undo_stack.push(invert_edit(&input, &edit));
perform_edit(&mut tree, &mut input, &edit).unwrap();

2
cli/src/tests/highlight_test.rs
View file

@ -597,7 +597,7 @@ fn test_highlighting_via_c_api() {
let output_line_offsets =
unsafe { slice::from_raw_parts(output_line_offsets, output_line_count as usize) };
let mut lines = Vec::new();
let mut lines = Vec::with_capacity(output_line_count as usize);
for i in 0..(output_line_count as usize) {
let line_start = output_line_offsets[i] as usize;
let line_end = output_line_offsets