Generate xxHash64 at RAM speed for databases, big data, and high-performance systems.
About
xxHash64 is an extremely fast 64-bit hash function using the XXH64 algorithm, achieving speeds exceeding 10 GB/s on modern CPUs, providing exceptional speed for non-cryptographic hashing in databases and analytics.
Specifications
Output Size64 bits
StandardxxHash specification (Yann Collet)
Standard Year2012
Use Cases
—Database index hashing and sharding
—Big data analytics and MapReduce
—Game asset checksums and deduplication
—File integrity in backup systems
—In-memory data structure hashing
Security Notice
xxHash64 is not cryptographically secure and must not be used for passwords, signatures, or security applications.
Frequently Asked Questions
No. xxHash64 is designed for speed, not security. It should never be used for passwords, digital signatures, or any security-sensitive applications. Use bcrypt, Argon2id, or SHA-256 for security purposes.
xxHash64 is one of the fastest hash functions available, capable of processing data at RAM speed (typically 10+ GB/s on modern CPUs). It is significantly faster than MD5 and orders of magnitude faster than cryptographic hashes like SHA-256.
Use xxHash64 when you need maximum compatibility with existing systems or when working with 64-bit platforms. xxHash3 is newer and faster but may not be supported in older systems. For new projects, xxHash3 or xxHash128 are recommended for better collision resistance.