Vendor things

This commit is contained in:
John Doty 2024-03-08 11:03:01 -08:00
parent 5deceec006
commit 977e3c17e5
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"js-sys",
"wasm-bindgen",
]
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name = "winapi-util"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

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@ -0,0 +1,40 @@
# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2018"
name = "phf_generator"
version = "0.10.0"
authors = ["Steven Fackler <sfackler@gmail.com>"]
description = "PHF generation logic"
license = "MIT"
repository = "https://github.com/sfackler/rust-phf"
[[bin]]
name = "gen_hash_test"
required-features = ["criterion"]
[[bench]]
name = "benches"
harness = false
[dependencies.criterion]
version = "=0.3.4"
optional = true
[dependencies.phf_shared]
version = "0.10.0"
default-features = false
[dependencies.rand]
version = "0.8"
features = ["small_rng"]
[dev-dependencies.criterion]
version = "=0.3.4"

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@ -0,0 +1,58 @@
use criterion::measurement::Measurement;
use criterion::{criterion_group, criterion_main, Bencher, BenchmarkId, Criterion};
use rand::distributions::Standard;
use rand::rngs::SmallRng;
use rand::{Rng, SeedableRng};
use phf_generator::generate_hash;
fn gen_vec(len: usize) -> Vec<u64> {
SmallRng::seed_from_u64(0xAAAAAAAAAAAAAAAA)
.sample_iter(Standard)
.take(len)
.collect()
}
fn bench_hash<M: Measurement>(b: &mut Bencher<M>, len: &usize) {
let vec = gen_vec(*len);
b.iter(|| generate_hash(&vec))
}
fn gen_hash_small(c: &mut Criterion) {
let sizes = vec![0, 1, 2, 5, 10, 25, 50, 75];
for size in &sizes {
c.bench_with_input(BenchmarkId::new("gen_hash_small", *size), size, bench_hash);
}
}
fn gen_hash_med(c: &mut Criterion) {
let sizes = vec![100, 250, 500, 1000, 2500, 5000, 7500];
for size in &sizes {
c.bench_with_input(BenchmarkId::new("gen_hash_medium", *size), size, bench_hash);
}
}
fn gen_hash_large(c: &mut Criterion) {
let sizes = vec![10_000, 25_000, 50_000, 75_000];
for size in &sizes {
c.bench_with_input(BenchmarkId::new("gen_hash_large", *size), size, bench_hash);
}
}
fn gen_hash_xlarge(c: &mut Criterion) {
let sizes = vec![100_000, 250_000, 500_000, 750_000, 1_000_000];
for size in &sizes {
c.bench_with_input(BenchmarkId::new("gen_hash_xlarge", *size), size, bench_hash);
}
}
criterion_group!(
benches,
gen_hash_small,
gen_hash_med,
gen_hash_large,
gen_hash_xlarge
);
criterion_main!(benches);

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@ -0,0 +1,20 @@
use criterion::*;
use rand::distributions::Alphanumeric;
use rand::rngs::SmallRng;
use rand::{Rng, SeedableRng};
use phf_generator::generate_hash;
fn gen_vec(len: usize) -> Vec<String> {
let mut rng = SmallRng::seed_from_u64(0xAAAAAAAAAAAAAAAA).sample_iter(Alphanumeric);
(0..len)
.map(move |_| rng.by_ref().take(64).collect::<String>())
.collect()
}
fn main() {
let data = black_box(gen_vec(1_000_000));
black_box(generate_hash(&data));
}

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@ -0,0 +1,105 @@
#![doc(html_root_url = "https://docs.rs/phf_generator/0.9")]
use phf_shared::{HashKey, PhfHash};
use rand::distributions::Standard;
use rand::rngs::SmallRng;
use rand::{Rng, SeedableRng};
const DEFAULT_LAMBDA: usize = 5;
const FIXED_SEED: u64 = 1234567890;
pub struct HashState {
pub key: HashKey,
pub disps: Vec<(u32, u32)>,
pub map: Vec<usize>,
}
pub fn generate_hash<H: PhfHash>(entries: &[H]) -> HashState {
SmallRng::seed_from_u64(FIXED_SEED)
.sample_iter(Standard)
.find_map(|key| try_generate_hash(entries, key))
.expect("failed to solve PHF")
}
fn try_generate_hash<H: PhfHash>(entries: &[H], key: HashKey) -> Option<HashState> {
struct Bucket {
idx: usize,
keys: Vec<usize>,
}
let hashes: Vec<_> = entries
.iter()
.map(|entry| phf_shared::hash(entry, &key))
.collect();
let buckets_len = (hashes.len() + DEFAULT_LAMBDA - 1) / DEFAULT_LAMBDA;
let mut buckets = (0..buckets_len)
.map(|i| Bucket {
idx: i,
keys: vec![],
})
.collect::<Vec<_>>();
for (i, hash) in hashes.iter().enumerate() {
buckets[(hash.g % (buckets_len as u32)) as usize]
.keys
.push(i);
}
// Sort descending
buckets.sort_by(|a, b| a.keys.len().cmp(&b.keys.len()).reverse());
let table_len = hashes.len();
let mut map = vec![None; table_len];
let mut disps = vec![(0u32, 0u32); buckets_len];
// store whether an element from the bucket being placed is
// located at a certain position, to allow for efficient overlap
// checks. It works by storing the generation in each cell and
// each new placement-attempt is a new generation, so you can tell
// if this is legitimately full by checking that the generations
// are equal. (A u64 is far too large to overflow in a reasonable
// time for current hardware.)
let mut try_map = vec![0u64; table_len];
let mut generation = 0u64;
// the actual values corresponding to the markers above, as
// (index, key) pairs, for adding to the main map once we've
// chosen the right disps.
let mut values_to_add = vec![];
'buckets: for bucket in &buckets {
for d1 in 0..(table_len as u32) {
'disps: for d2 in 0..(table_len as u32) {
values_to_add.clear();
generation += 1;
for &key in &bucket.keys {
let idx = (phf_shared::displace(hashes[key].f1, hashes[key].f2, d1, d2)
% (table_len as u32)) as usize;
if map[idx].is_some() || try_map[idx] == generation {
continue 'disps;
}
try_map[idx] = generation;
values_to_add.push((idx, key));
}
// We've picked a good set of disps
disps[bucket.idx] = (d1, d2);
for &(idx, key) in &values_to_add {
map[idx] = Some(key);
}
continue 'buckets;
}
}
// Unable to find displacements for a bucket
return None;
}
Some(HashState {
key,
disps,
map: map.into_iter().map(|i| i.unwrap()).collect(),
})
}