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Shrink capacity in `RateLimitStorage::remove_older_than` (#3536) 

* Shrink capacity in `RateLimitStorage::remove_older_than`

* Update rate_limiter.rs

* rerun ci

* rerun ci

* rerun ci

* Update rate_limiter.rs
pull/3581/head
dullbananas 2023-07-10 13:52:37 -07:00 committed by GitHub
parent ef9dc5d0b6
commit 73492af4b0
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1 changed files with 16 additions and 6 deletions
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22
crates/utils/src/rate_limit/rate_limiter.rs
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@ -2,6 +2,7 @@ use enum_map::{enum_map, EnumMap};
use once_cell::sync::Lazy;
use std::{
collections::HashMap,
hash::Hash,
net::{IpAddr, Ipv4Addr, Ipv6Addr},
time::{Duration, Instant},
};
@ -206,13 +207,13 @@ impl RateLimitStorage {
.all(|bucket| bucket.last_checked.to_instant() > instant)
};
self.ipv4_buckets.retain(|_, group| is_recently_used(group));
retain_and_shrink(&mut self.ipv4_buckets, |_, group| is_recently_used(group));
self.ipv6_buckets.retain(|_, group_48| {
group_48.children.retain(|_, group_56| {
group_56
.children
.retain(|_, group_64| is_recently_used(group_64));
retain_and_shrink(&mut self.ipv6_buckets, |_, group_48| {
retain_and_shrink(&mut group_48.children, |_, group_56| {
retain_and_shrink(&mut group_56.children, |_, group_64| {
is_recently_used(group_64)
});
!group_56.children.is_empty()
});
!group_48.children.is_empty()
@ -220,6 +221,15 @@ impl RateLimitStorage {
}
}
fn retain_and_shrink<K, V, F>(map: &mut HashMap<K, V>, f: F)
where
K: Eq + Hash,
F: FnMut(&K, &mut V) -> bool,
{
map.retain(f);
map.shrink_to_fit();
}
fn split_ipv6(ip: Ipv6Addr) -> ([u8; 6], u8, u8) {
let [a0, a1, a2, a3, a4, a5, b, c, ..] = ip.octets();
([a0, a1, a2, a3, a4, a5], b, c)