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All Projects → arthurprs → metrohash-rs

arthurprs / metrohash-rs

Licence: MIT license
Rust MetroHash

Programming Languages

rust
11053 projects

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Rust MetroHash

crates.io Docs Build Status

MetroHash is a high quality, high performance hash algorithm.

It hashes small keys in the single digit nanoseconds and surpasses 10+ GB/s in medium to long length keys.

Since the hash quality is also excellent (passes SMhasher), it's a good alternative in any situation where cryptographic security is not required.

Note that the algorithm is not stable across different endianesses and is optimized for 64bit platforms with fast unaligned memory access.

Usage

extern crate metrohash;
use metrohash::MetroHashMap;

let mut hash = MetroHashMap::default();
hash.insert(1000, "1000");
assert_eq!(hash.get(&1000), Some(&"1000"));

Benchmarks

test metro64::hash_u64          ... bench:           7 ns/iter (+/- 0) = 1142 MB/s
test metro64::hash_004_bytes    ... bench:           7 ns/iter (+/- 0) = 571 MB/s
test metro64::hash_007_bytes    ... bench:           8 ns/iter (+/- 0) = 875 MB/s
test metro64::hash_008_bytes    ... bench:           7 ns/iter (+/- 0) = 1142 MB/s
test metro64::hash_009_bytes    ... bench:           7 ns/iter (+/- 6) = 1285 MB/s
test metro64::hash_012_bytes    ... bench:           7 ns/iter (+/- 1) = 1714 MB/s
test metro64::hash_016_bytes    ... bench:           9 ns/iter (+/- 0) = 1777 MB/s
test metro64::hash_032_bytes    ... bench:          11 ns/iter (+/- 0) = 2909 MB/s
test metro64::hash_128_bytes    ... bench:          19 ns/iter (+/- 1) = 6736 MB/s
test metro64::hash_256_bytes    ... bench:          28 ns/iter (+/- 9) = 9142 MB/s
test metro64::hash_512_bytes    ... bench:          49 ns/iter (+/- 5) = 10448 MB/s
test metro64::hash_1_kilo_bytes ... bench:          88 ns/iter (+/- 36) = 11636 MB/s
test fnvh::hash_u64             ... bench:           3 ns/iter (+/- 2) = 2666 MB/s
test fnvh::hash_004_bytes       ... bench:           1 ns/iter (+/- 0) = 4000 MB/s
test fnvh::hash_007_bytes       ... bench:           3 ns/iter (+/- 0) = 2333 MB/s
test fnvh::hash_008_bytes       ... bench:           3 ns/iter (+/- 0) = 2666 MB/s
test fnvh::hash_009_bytes       ... bench:           3 ns/iter (+/- 0) = 3000 MB/s
test fnvh::hash_012_bytes       ... bench:           5 ns/iter (+/- 0) = 2400 MB/s
test fnvh::hash_016_bytes       ... bench:           7 ns/iter (+/- 0) = 2285 MB/s
test fnvh::hash_032_bytes       ... bench:          17 ns/iter (+/- 1) = 1882 MB/s
test fnvh::hash_128_bytes       ... bench:         125 ns/iter (+/- 9) = 1024 MB/s
test fnvh::hash_256_bytes       ... bench:         280 ns/iter (+/- 34) = 914 MB/s
test fnvh::hash_512_bytes       ... bench:         589 ns/iter (+/- 36) = 869 MB/s
test fnvh::hash_1_kilo_bytes    ... bench:       1,192 ns/iter (+/- 43) = 859 MB/s
test std_sip::hash_u64          ... bench:          16 ns/iter (+/- 0) = 500 MB/s
test std_sip::hash_004_bytes    ... bench:          12 ns/iter (+/- 3) = 333 MB/s
test std_sip::hash_007_bytes    ... bench:          14 ns/iter (+/- 0) = 500 MB/s
test std_sip::hash_008_bytes    ... bench:          15 ns/iter (+/- 1) = 533 MB/s
test std_sip::hash_009_bytes    ... bench:          17 ns/iter (+/- 9) = 529 MB/s
test std_sip::hash_012_bytes    ... bench:          16 ns/iter (+/- 0) = 750 MB/s
test std_sip::hash_016_bytes    ... bench:          19 ns/iter (+/- 2) = 842 MB/s
test std_sip::hash_032_bytes    ... bench:          27 ns/iter (+/- 2) = 1185 MB/s
test std_sip::hash_128_bytes    ... bench:          72 ns/iter (+/- 18) = 1777 MB/s
test std_sip::hash_256_bytes    ... bench:         133 ns/iter (+/- 13) = 1924 MB/s
test std_sip::hash_512_bytes    ... bench:         254 ns/iter (+/- 22) = 2015 MB/s
test std_sip::hash_1_kilo_bytes ... bench:         500 ns/iter (+/- 55) = 2048 MB/s
test xxh::hash_u64              ... bench:          11 ns/iter (+/- 0) = 727 MB/s
test xxh::hash_004_bytes        ... bench:          12 ns/iter (+/- 1) = 333 MB/s
test xxh::hash_007_bytes        ... bench:          20 ns/iter (+/- 1) = 350 MB/s
test xxh::hash_008_bytes        ... bench:          12 ns/iter (+/- 4) = 666 MB/s
test xxh::hash_009_bytes        ... bench:          19 ns/iter (+/- 5) = 473 MB/s
test xxh::hash_012_bytes        ... bench:          19 ns/iter (+/- 1) = 631 MB/s
test xxh::hash_016_bytes        ... bench:          13 ns/iter (+/- 0) = 1230 MB/s
test xxh::hash_032_bytes        ... bench:          17 ns/iter (+/- 4) = 1882 MB/s
test xxh::hash_128_bytes        ... bench:          25 ns/iter (+/- 1) = 5120 MB/s
test xxh::hash_256_bytes        ... bench:          36 ns/iter (+/- 2) = 7111 MB/s
test xxh::hash_512_bytes        ... bench:          57 ns/iter (+/- 28) = 8982 MB/s
test xxh::hash_1_kilo_bytes     ... bench:          98 ns/iter (+/- 7) = 10448 MB/s

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