From 93d546a36dab041fd6816ad3dff476e3fd42f5d8 Mon Sep 17 00:00:00 2001
From: Doohyun Cho <158799614+doocho@users.noreply.github.com>
Date: Thu, 19 Feb 2026 13:02:20 +0900
Subject: [PATCH] perf(trie): preserve allocations in sparse trie wipe()
 (#21089)

---
 crates/trie/sparse/src/parallel.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crates/trie/sparse/src/parallel.rs b/crates/trie/sparse/src/parallel.rs
index 20c0e972c5..765e8b074b 100644
--- a/crates/trie/sparse/src/parallel.rs
+++ b/crates/trie/sparse/src/parallel.rs
@@ -3045,7 +3045,8 @@ impl SparseSubtrie {
     /// Removes all nodes and values from the subtrie, resetting it to a blank state
     /// with only an empty root node. This is used when a storage root is deleted.
     fn wipe(&mut self) {
-        self.nodes = HashMap::from_iter([(Nibbles::default(), SparseNode::Empty)]);
+        self.nodes.clear();
+        self.nodes.insert(Nibbles::default(), SparseNode::Empty);
         self.inner.clear();
     }