diff --git a/src/main/rust/src/utils/hash.rs b/src/main/rust/src/utils/hash.rs
index cc6ae73..4deb239 100644
--- a/src/main/rust/src/utils/hash.rs
+++ b/src/main/rust/src/utils/hash.rs
@@ -1,25 +1,12 @@
 #[inline]
 pub fn bytes(bytes: &[u8]) -> u64 {
-    // hash from https://curiouscoding.nl/posts/1brc/ still wrong for measurements3.txt (and slower?)
-    //let mut key = [0u8; 8];
-    //let l = bytes.len().min(8);
-    //key[..l].copy_from_slice(&bytes[..l]);
-    //key[0] ^= bytes.len() as u8;
-    //u64::from_ne_bytes(key)
-    let mut hash: u64 = 0;
-    let (chunks, remainder) = bytes.as_chunks::<8>();
-    for &chunk in chunks {
-        hash = hash.wrapping_add(u64::from_be_bytes(chunk));
-    }
-    let mut r = [0_u8; 8];
-    r[0] = remainder.len() as u8;
-    let mut idx = 1;
-    for &byte in remainder {
-        r[idx] = byte;
-        idx += 1;
-    }
-    hash += u64::from_be_bytes(r);
-    hash
+    // inspired by https://curiouscoding.nl/posts/1brc/
+    let head: [u8; 8] = unsafe { bytes.get_unchecked(..8).as_chunks::<8>().0[0] };
+    let tail: [u8; 8] = unsafe { bytes.get_unchecked(bytes.len() - 8..).as_chunks::<8>().0[0] };
+    let shift = 64usize.saturating_sub(8 * bytes.len());
+    let khead = u64::from_ne_bytes(head) << shift;
+    let ktail = u64::from_ne_bytes(tail) >> shift;
+    khead + ktail    //let mut hash: u64 = 0;
 }
 
 #[cfg(test)]