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feat(trie): Embed a SparseSubtrie into the ParallelSparseTrie as its upper trie (#16905)

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This commit is contained in:
Brian Picciano
2025-06-18 17:48:27 +02:00
committed by GitHub
parent 8d8d197466
commit 96c7381932
1 changed files with 6 additions and 11 deletions
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17
crates/trie/sparse/src/parallel_trie.rs
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@@ -13,16 +13,10 @@ use reth_trie_common::{Nibbles, TrieNode};
/// - All keys in `values` collection are full leaf paths.
#[derive(Clone, PartialEq, Eq, Debug)]
pub struct ParallelSparseTrie {
/// The root of the sparse trie.
root_node: SparseNode,
/// Map from a path (nibbles) to its corresponding sparse trie node.
/// This contains the trie nodes for the upper part of the trie.
upper_trie: HashMap<Nibbles, SparseNode>,
upper_subtrie: SparseSubtrie,
/// An array containing the subtries at the second level of the trie.
subtries: [Option<SparseSubtrie>; 256],
/// Map from leaf key paths to their values.
/// All values are stored here instead of directly in leaf nodes.
values: HashMap<Nibbles, Vec<u8>>,
/// Optional tracking of trie updates for later use.
updates: Option<SparseTrieUpdates>,
}
@@ -30,10 +24,8 @@ pub struct ParallelSparseTrie {
impl Default for ParallelSparseTrie {
fn default() -> Self {
Self {
root_node: SparseNode::Empty,
upper_trie: HashMap::default(),
upper_subtrie: SparseSubtrie::default(),
subtries: [const { None }; 256],
values: HashMap::default(),
updates: None,
}
}
@@ -91,12 +83,15 @@ impl ParallelSparseTrie {
/// This is a subtrie of the `ParallelSparseTrie` that contains a map from path to sparse trie
/// nodes.
#[derive(Clone, PartialEq, Eq, Debug)]
#[derive(Clone, PartialEq, Eq, Debug, Default)]
pub struct SparseSubtrie {
/// The root path of this subtrie.
path: Nibbles,
/// The map from paths to sparse trie nodes within this subtrie.
nodes: HashMap<Nibbles, SparseNode>,
/// Map from leaf key paths to their values.
/// All values are stored here instead of directly in leaf nodes.
values: HashMap<Nibbles, Vec<u8>>,
}
/// Sparse Subtrie Type.