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@ -354,24 +354,25 @@ impl<'a> CapturedNode<'a> {
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}
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}
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/// The number of matches a TS cursor can at once to avoid performance problems for medium to large files.
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/// Set with `set_match_limit`.
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/// Using such a limit means that we lose valid captures in, so there is fundamentally a tradeoff here.
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/// The maximum number of in-progress matches a TS cursor can consider at once.
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/// This is set to a constant in order to avoid performance problems for medium to large files. Set with `set_match_limit`.
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/// Using such a limit means that we lose valid captures, so there is fundamentally a tradeoff here.
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///
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///
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/// Old tree sitter versions used a limit of 32 by default until this limit was removed in version `0.19.5` (must now be set manually).
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/// However, this causes performance issues for medium to large files.
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/// In helix, this problem caused treesitter motions to take multiple seconds to complete in medium-sized rust files (3k loc).
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///
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///
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/// Neovim also encountered this problem and reintroduced this limit after it was removed upstream
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/// (see <https://github.com/neovim/neovim/issues/14897> and <https://github.com/neovim/neovim/pull/14915>).
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/// The number used here is fundamentally a tradeoff between breaking some obscure edge cases and performance.
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///
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///
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/// A value of 64 was chosen because neovim uses that value.
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/// Neovim chose this value somewhat arbitrarily (<https://github.com/neovim/neovim/pull/18397>) adjusting it whenever issues occur in practice.
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/// However this value has been in use for a long time and due to the large userbase of neovim it is probably a good choice.
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/// If this limit causes problems for a grammar in the future, it could be increased.
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const TREE_SITTER_MATCH_LIMIT: u32 = 64;
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/// Neovim chose 64 for this value somewhat arbitrarily (<https://github.com/neovim/neovim/pull/18397>).
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/// 64 is too low for some languages though. In particular, it breaks some highlighting for record fields in Erlang record definitions.
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/// This number can be increased if new syntax highlight breakages are found, as long as the performance penalty is not too high.
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const TREE_SITTER_MATCH_LIMIT: u32 = 256;
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impl TextObjectQuery {
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/// Run the query on the given node and return sub nodes which match given
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