Vs Md5 Repack: Xxhash
: Outputs a 32-bit integer (optimized for 32-bit systems).
When deciding between xxHash and MD5, let performance requirements drive your decision.
Today, modern hardware can generate an MD5 collision in . For this reason, all major security standards—including NIST, Microsoft, and open-source communities—explicitly discourage the use of MD5 for any security-related purpose. xxhash vs md5
When it comes to processing throughput, xxHash operates in a completely different league than MD5. xxHash is designed to run at , utilizing modern CPU architectures, instruction-level parallelism, and vectorized operations. xxHash (XXH64 / XXH3) Execution Speed Extremely Fast (~10–30 GB/s) Moderate (~300–600 MB/s) CPU Utilization Highly optimized for modern 64-bit / Vector CPUs Serial execution, lacks modern CPU optimizations Latency Minimal, ideal for small and large data alike Higher latency per block processing
MD5 calculates mathematical steps to ensure no two inputs produce the same output (which it fails at now, but the math is still there). xxHash assumes the input isn't malicious and just shuffles bits as quickly as the CPU allows. : Outputs a 32-bit integer (optimized for 32-bit systems)
In many scenarios, xxHash is faster than the raw RAM throughput of a system, making it an incredibly efficient choice for processing large datasets.
xxHash provides fast retrieval of data for indexing and in-memory databases. Its high speed and low collision rate make it perfect for hash table implementations. xxHash (XXH64 / XXH3) Execution Speed Extremely Fast
passes all SMHasher quality tests perfectly. It provides an excellent, uniform distribution of hash values, meaning random data naturally spreads out evenly across the hash space. The probability of an accidental collision using XXH64 (a 64-bit output) or XXH128 (a 128-bit output) is infinitesimally small.
| Feature | MD5 (Message Digest Algorithm 5) | xxHash (specifically xxHash64) | | :--- | :--- | :--- | | | Cryptographic Security (now broken) | Extreme Speed / Non-Cryptographic | | Speed | Moderate (Bound by CPU security math) | Insanely Fast (RAM speed bottleneck) | | Collision Resistance | Broken (Easy to engineer collisions) | Low (Not designed for security) | | Output Size | 128-bit | 64-bit (or 128-bit in xxh3) | | Randomness | Excellent distribution | Good distribution | | Best Use Case | Legacy compatibility, non-security IDs | File integrity, Hash Tables, Caching |
was designed as a cryptographic hash function. It was built to secure data against intentional tampering, though it is now considered broken for security purposes.