Module style::bloom

The style bloom filter is used as an optimization when matching deep descendant selectors.

Structs

• PushedElement 🔒
• StyleBloom
  A struct that allows us to fast-reject deep descendant selectors avoiding selector-matching.

Constants

• BLOOM_KEY 🔒
  Bloom filters are large allocations, so we store them in thread-local storage such that they can be reused across style traversals. StyleBloom is responsible for ensuring that the bloom filter is zeroed when it is dropped.
• MEMSET_CLEAR_THRESHOLD 🔒
  The very rough benchmarks in the selectors crate show clear() costing about 25 times more than remove_hash(). We use this to implement clear() more efficiently when only a small number of hashes have been pushed.

Functions

• each_relevant_element_hash
  Gather all relevant hash for fast-reject filters from an element.
• is_attr_name_excluded_from_filter
  Returns whether the attribute name is excluded from the bloom filter.