Xxhash Vs Md5 Page

| Hash | Speed (GB/s) | Relative Speed | | :-------- | :----------- | :------------- | | xxHash | ~12.0 GB/s | 30x faster | | MD5 | ~0.4 GB/s | 1x (baseline) | | SHA-1 | ~0.3 GB/s | 0.75x slower | | SHA-256 | ~0.15 GB/s | 0.37x slower |

At that speed, xxHash can process an entire 4K Blu-ray movie (100GB) in about 8 seconds. MD5 would take over 4 minutes. Why is xxHash so fast? xxHash is a non-cryptographic hash . It exploits instruction-level parallelism, uses large 64-bit blocks, and avoids the complex bit-rotations and boolean functions required for cryptographic security. It is designed for RAM speed, not CPU limits. Feature Comparison Matrix | Feature | xxHash (v3) | MD5 | | --------------------- | --------------------- | --------------------------- | | Output Size | 32, 64, or 128 bits | 128 bits | | Cryptographic Security | ❌ No (vulnerable to collisions) | ❌ Broken (collisions trivial) | | Pre-image Resistance | ❌ No | ❌ No (broken) | | Checksum/Integrity | ✅ Excellent | ✅ Adequate (legacy) | | Deduplication | ✅ Perfect (low collisions) | ⚠️ Overkill (slow) | | Hash Tables / Bloom Filters | ✅ Ideal | ❌ Too slow | | Standardized | ❌ (de facto) | ✅ Yes (RFC 1321) | | Non-adversarial collisions | Extremely rare | Extremely rare | The Collision Question MD5’s Fatal Flaw Since 2004, researchers have found that creating two different files with the same MD5 hash is computationally trivial. An attacker can generate a "good" program and a "malicious" program that share the same MD5 signature. xxhash vs md5

When you need to hash data, your first instinct might be to reach for MD5 . It’s ubiquitous, supported everywhere, and easy to remember. | Hash | Speed (GB/s) | Relative Speed

Expected output: xxHash is ~25-35x faster | If your goal is... | Choose... | | -------------------------------------- | ---------------- | | Maximum speed, no attackers | xxHash | | Legacy compatibility | MD5 | | Security against tampering | SHA-256 / BLAKE3 | | Password storage | Argon2 / bcrypt | | Best of all worlds (2025+) | BLAKE3 | xxHash is a non-cryptographic hash