diff options
| author | edef <edef@unfathomable.blue> | 2022-05-02 18:37:30 +0000 |
|---|---|---|
| committer | edef <edef@unfathomable.blue> | 2022-05-02 18:37:30 +0000 |
| commit | 988bb3edce739650088cfc965204280b5ee889a7 (patch) | |
| tree | 10317b597535695a93f7cede3396223ca672de4a /ripple/fossil/src/chunker/mod.rs | |
| parent | 71c71783d4efa7f44af910daf015e6972f069472 (diff) | |
| download | unf-legacy-988bb3edce739650088cfc965204280b5ee889a7.tar.zst | |
ripple/fossil/chunker: remove hasher initialisation bounds check
We already check for `self.buffer.len() <= MIN_CHUNK_SIZE`, but LLVM doesn't seem to notice. This boosts throughput by 35%. Change-Id: I1a0e07d276dcc285f8dec3149a629cb6e865c286
Diffstat (limited to 'ripple/fossil/src/chunker/mod.rs')
| -rw-r--r-- | ripple/fossil/src/chunker/mod.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/ripple/fossil/src/chunker/mod.rs b/ripple/fossil/src/chunker/mod.rs index 16e81a2..88414a2 100644 --- a/ripple/fossil/src/chunker/mod.rs +++ b/ripple/fossil/src/chunker/mod.rs @@ -49,7 +49,12 @@ impl<'a> Iterator for Chunker<'a> { } let bytes = self.buffer.iter().take(MAX_CHUNK_SIZE).skip(MIN_CHUNK_SIZE); - let mut hasher = buz::Rolling::<WINDOW_SIZE>::from_slice(&self.buffer[..MIN_CHUNK_SIZE]); + let mut hasher = unsafe { + // SAFETY: `self.buffer.len > MIN_CHUNK_SIZE`, so this is in bounds + buz::Rolling::<WINDOW_SIZE>::from_slice_unchecked( + self.buffer.get_unchecked(..MIN_CHUNK_SIZE), + ) + }; for byte in bytes { let buz::Hash(x) = hasher.sum(); if x % DISCRIMINATOR == DISCRIMINATOR.wrapping_sub(1) { |