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LibWeb: Add a Vector::ensure_capacity() in collect_matching_rules()

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Avoid some incremental Vector growth by pre-allocating enough capacity
to cover the case where every single selector matches an element.
This commit is contained in:
Andreas Kling 2022-03-13 19:55:08 +01:00
parent afc5fade05
commit c1e6fc67a1
1 changed files with 1 additions and 0 deletions
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1
Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
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@ -92,6 +92,7 @@ Vector<MatchingRule> StyleComputer::collect_matching_rules(DOM::Element const& e
}
Vector<MatchingRule> matching_rules;
matching_rules.ensure_capacity(rules_to_run.size());
for (auto const& rule_to_run : rules_to_run) {
auto const& selector = rule_to_run.rule->selectors()[rule_to_run.selector_index];
if (SelectorEngine::matches(selector, element, pseudo_element))