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avoid growing vec

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This commit is contained in:
Jussi Saurio
2025-05-12 22:38:51 +03:00
parent 625cf005fd
commit d2fa91e984
1 changed files with 4 additions and 2 deletions
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6
core/translate/optimizer/join.rs
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@@ -56,13 +56,15 @@ pub fn join_lhs_and_rhs<'a>(
let rhs_table_number = join_order.last().unwrap().table_no;
let new_numbers = lhs.map_or(vec![rhs_table_number], |l| {
let mut numbers = l.table_numbers.clone();
let mut numbers = Vec::with_capacity(l.table_numbers.len() + 1);
numbers.extend(l.table_numbers.iter().cloned());
numbers.push(rhs_table_number);
numbers
});
access_methods_arena.borrow_mut().push(best_access_method);
let mut best_access_methods = lhs.map_or(vec![], |l| l.best_access_methods.clone());
let mut best_access_methods = Vec::with_capacity(new_numbers.len());
best_access_methods.extend(lhs.map_or(vec![], |l| l.best_access_methods.clone()));
best_access_methods.push(access_methods_arena.borrow().len() - 1);
let lhs_mask = lhs.map_or(TableMask::new(), |l| {