rapidhashNano hash function.

Synopsis

Declared in <folly/external/rapidhash/rapidhash.h>

constexpr
uint64_t
rapidhashNano(
    char const* key,
    size_t len) noexcept;

Description

Designed for mobile and embedded applications, where keeping a small code size is a top priority. Clang‐18+ compiles it to less than 100 instructions without stack usage, both on x86‐64 and aarch64. The fastest for sizes up to 48 bytes, but may be considerably slower for larger inputs.

Calls rapidhashNano_with_seed using the provided parameters and the default seed.

Return Value

A 64‐bit hash.

Parameters

Name

Description

key

Buffer to be hashed.

len

Length of key, in bytes.

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