dogeystamp/chess_inator
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf: zobrist table no longer compares hash before overwrites

Browse Source
This commit is contained in:
dogeystamp 2024-11-23 18:51:49 -05:00
parent 8895770da6
commit e79f19942e
No known key found for this signature in database
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/hash.rs
View File

@ -114,16 +114,15 @@ impl<T: Copy> ZobristTable<T> {
} }
impl<T> IndexMut<Zobrist> for ZobristTable<T> { impl<T> IndexMut<Zobrist> for ZobristTable<T> {
/// Overwrite a table entry.
///
/// If you `mut`ably index, it will automatically wipe an existing entry,
/// regardless of it was a cache hit or miss.
fn index_mut(&mut self, zobrist: Zobrist) -> &mut Self::Output { fn index_mut(&mut self, zobrist: Zobrist) -> &mut Self::Output {
let idx = zobrist.truncate_hash(self.size); let idx = zobrist.truncate_hash(self.size);
if self.data[idx].0 == zobrist { self.data[idx].0 = zobrist;
&mut self.data[idx].1 self.data[idx].1 = None;
} else { &mut self.data[idx].1
// miss, overwrite
self.data[idx].0 = zobrist;
self.data[idx].1 = None;
&mut self.data[idx].1
}
} }
} }