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Fast path for linear deeply nested children

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This commit is contained in:
novacrazy 2023-04-05 21:17:37 -05:00
parent af5b226e53
commit c0964c2b01
1 changed files with 18 additions and 6 deletions
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24
leptos_reactive/src/runtime.rs
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@ -246,11 +246,11 @@ impl Runtime {
while let Some(iter) = stack.last_mut() {
let res = iter.with_iter_mut(|iter| {
let Some(&child) = iter.next() else {
let Some(mut child) = iter.next().copied() else {
return IterResult::Empty;
};
if let Some(node) = nodes.get_mut(child) {
while let Some(node) = nodes.get_mut(child) {
if node.state == ReactiveNodeState::Check
|| node.state == ReactiveNodeState::DirtyMarked
{
@ -266,11 +266,23 @@ impl Runtime {
);
if let Some(children) = subscribers.get(child) {
return IterResult::NewIter(RefIter::new(
children.borrow(),
|children| children.iter(),
));
let children = children.borrow();
if !children.is_empty() {
// avoid going through an iterator in the simple psuedo-recursive case
if children.len() == 1 {
child = children[0];
continue;
}
return IterResult::NewIter(RefIter::new(
children,
|children| children.iter(),
));
}
}
break;
}
IterResult::Continue