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# BLAKE3

BLAKE3 is a cryptographic hash function that is:

- **Much faster** than MD5, SHA-1, SHA-2, SHA-3, and BLAKE2.
- **Secure**, unlike MD5 and SHA-1. And secure against length extension,
  unlike SHA-2.
- **Highly parallelizable** across any number of threads and SIMD lanes,
  because it's a Merkle tree on the inside.
- Capable of **verified streaming** and **incremental updates**, again
  because it's a Merkle tree.
- A **PRF**, **MAC**, **KDF**, and **XOF**, as well as a regular hash.
- **One algorithm with no variants**, which is fast on x86-64 and also
  on smaller architectures.

The [chart below](https://github.com/BLAKE3-team/BLAKE3-specs/blob/master/benchmarks/bar_chart.py)
is an example benchmark of 16 KiB inputs on a Cascade Lake-SP 8275CL server CPU
from 2019. For more detailed benchmarks, see the
[BLAKE3 paper](https://github.com/BLAKE3-team/BLAKE3-specs/blob/master/blake3.pdf).

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