Struct SelectorMatchCache 

pub struct SelectorMatchCache { /* private fields */ }

Memoizes selector match results for one DOM/rule-set epoch.

Implementations

impl SelectorMatchCache

pub fn new() -> Self

pub fn with_capacity(capacity: usize) -> Self

pub fn get_or_insert( &mut self, selector: &Arc<ComplexSelector>, node_id: NodeId, compute: impl FnOnce() -> bool, ) -> bool

Returns the cached match result for selector against node_id, computing and storing it with compute on a miss.

Entries from a previous epoch are treated as misses: they are never returned, even if they happen to still be in the map.

pub fn clear(&mut self)

Drops every entry and bumps the epoch. Call when the DOM snapshot or the rule set changes.

After this call, all previously cached results are stale: [get_or_insert] will treat them as misses because their epoch no longer matches.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn capacity(&self) -> usize

pub fn stats(&self) -> CacheStatsSnapshot

Trait Implementations

impl Default for SelectorMatchCache

fn default() -> Self

Returns the “default value” for a type.