perf: iterate through nibbles (paradigmxyz#17820)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

Author: dawksh

Cargo.lock

@@ -546,7 +546,7 @@ linked_hash_set = "0.1"
 lz4 = "1.28.1"
 modular-bitfield = "0.11.2"
 notify = { version = "8.0.0", default-features = false, features = ["macos_fsevent"] }
-nybbles = { version = "0.4.0", default-features = false }
+nybbles = { version = "0.4.2", default-features = false }
 once_cell = { version = "1.19", default-features = false, features = ["critical-section"] }
 parking_lot = "0.12"
 paste = "1.0"

Cargo.toml

@@ -28,7 +28,9 @@ impl reth_codecs::Compact for StoredNibbles {
     where
         B: bytes::BufMut + AsMut<[u8]>,
     {
-        buf.put_slice(&self.0.to_vec());
+        for i in self.0.iter() {
+            buf.put_u8(i);
+        }
         self.0.len()
     }
 
@@ -77,7 +79,9 @@ impl reth_codecs::Compact for StoredNibblesSubKey {
         assert!(self.0.len() <= 64);
 
         // right-pad with zeros
-        buf.put_slice(&self.0.to_vec());
+        for i in self.0.iter() {
+            buf.put_u8(i);
+        }
         static ZERO: &[u8; 64] = &[0; 64];
         buf.put_slice(&ZERO[self.0.len()..]);