This is where the two diverge sharply. MD5 was designed to be relatively fast for its time, but it cannot compete with modern algorithms optimized for modern CPUs.

Extremely stable and widely used in big data (Presto, RocksDB, etc.).

Cryptographically broken. It is vulnerable to "collision attacks," where two different inputs produce the exact same hash.

In the battle of , xxHash is the clear winner for almost every modern technical application. It is significantly faster, passes more rigorous randomness tests, and is better suited for high-throughput environments. Unless you are forced to use MD5 by a legacy requirement, xxHash (specifically XXH3 or XXH64) is the superior choice.

High-performance data processing, hash tables, and real-time checksums. 3. Key Comparisons Performance (Speed)

A collision occurs when two different pieces of data produce the same hash.

You want a modern, well-maintained algorithm optimized for 64-bit systems. Use MD5 if:

xxHash vs. MD5: Speed, Security, and Choosing the Right Hash

Significantly slower, often topping out at around 400–600 MB/s. Verdict: xxHash is roughly 20 to 50 times faster than MD5. Security and Reliability