compared to using direct lookup on the set itself.
toTrie
fn
auto toTrie(size_t level, Set)(Set set) if (isCodepointSet!Set)Convenience function to construct optimal configurations for packed Trie from any set of U+.
The parameter level indicates the number of trie levels to use, allowed values are: 1, 2, 3 or 4. Levels represent different trade-offs speed-size wise.
Level 1 is fastest and the most memory hungry (a bit array).
Level 4 is the slowest and has the smallest footprint.
See the Synopsis, Synopsis section for example.
Note
Level 4 stays very practical (being faster and more predictable)