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Performance Optimizations for Bloom Filter #2674

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Merged
TheTechromancer merged 1 commit into from
Sep 4, 2025
Merged

Performance Optimizations for Bloom Filter #2674

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13 changes: 6 additions & 7 deletions bbot/core/helpers/bloom.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import os
import mmh3
import mmap
import xxhash


class BloomFilter:
Expand Down Expand Up @@ -55,14 +56,12 @@ def _hashes(self, item):
if not isinstance(item, str):
item = str(item)
item = item.encode("utf-8")
return [abs(hash(item)) % self.size, abs(mmh3.hash(item)) % self.size, abs(self._fnv1a_hash(item)) % self.size]

def _fnv1a_hash(self, data):
hash = 0x811C9DC5 # 2166136261
for byte in data:
hash ^= byte
hash = (hash * 0x01000193) % 2**32 # 16777619
return hash
return [
abs(hash(item)) % self.size,
abs(mmh3.hash(item)) % self.size,
abs(xxhash.xxh32(item).intdigest()) % self.size,
]

def close(self):
"""Explicitly close the memory-mapped file."""
Expand Down
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