switch to FnvHashMap

Author: sunshowers

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.2.1] - 2022-12-27
+
+## Changed
+
+- Internal change: switch to `FnvHashMap` for `future_queue_grouped`.
+
 ## [0.2.0] - 2022-12-27
 
 ## Added
@@ -23,6 +29,7 @@
 
 - Initial release.
 
+[0.2.1]: https://github.com/nextest-rs/future-queue/releases/tag/0.2.1
 [0.2.0]: https://github.com/nextest-rs/future-queue/releases/tag/0.2.0
 [0.1.2]: https://github.com/nextest-rs/future-queue/releases/tag/0.1.2
 [0.1.1]: https://github.com/nextest-rs/future-queue/releases/tag/0.1.1

Cargo.toml

@@ -12,6 +12,7 @@ categories = ["asynchronous"]
 keywords = ["stream", "futures", "async", "buffer_unordered"]
 
 [dependencies]
+fnv = "1.0.7"
 futures-util = { version = "0.3.25", default-features = false, features = ["std"] }
 pin-project-lite = "0.2.9"
 

src/future_queue_grouped.rs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
 use crate::peekable_fused::PeekableFused;
+use fnv::FnvHashMap;
 use futures_util::{
     ready,
     stream::{Fuse, FusedStream, FuturesUnordered},
@@ -10,7 +11,7 @@ use futures_util::{
 use pin_project_lite::pin_project;
 use std::{
     borrow::Borrow,
-    collections::{HashMap, VecDeque},
+    collections::VecDeque,
     fmt,
     hash::Hash,
     pin::Pin,
@@ -347,7 +348,7 @@ where
 
 #[derive(Debug)]
 struct GroupStore<Q, K, Fut> {
-    group_data: HashMap<K, GroupData<Q, Fut>>,
+    group_data: FnvHashMap<K, GroupData<Q, Fut>>,
 }
 
 impl<Q, K, Fut> GroupStore<Q, K, Fut>