perf: use rustc-hash for HashMap and HashSet

Author: Cheong-Lau

Cargo.lock

@@ -54,6 +54,7 @@ libcosmic = { git = "https://github.com/pop-os/libcosmic", default-features = fa
 ] }
 rust-embed = "8.7.2"
 rust-embed-utils = "8.7.2"
+rustc-hash = "2.1"
 rustix = { version = "1.1", features = ["fs", "process"] }
 zbus = { version = "5.11.0", default-features = false, features = ["tokio"] }
 tracing = "0.1"

Cargo.toml

@@ -19,6 +19,7 @@ memmap2 = "0.9.8"
 fastrand = "2.3.0"
 rust-embed.workspace = true
 rustix.workspace = true
+rustc-hash.workspace = true
 switcheroo-control = { git = "https://github.com/pop-os/dbus-settings-bindings" }
 tokio.workspace = true
 tracing-log.workspace = true

cosmic-app-list/Cargo.toml

@@ -53,7 +53,8 @@ use cosmic_app_list_config::{APP_ID, AppListConfig};
 use cosmic_protocols::toplevel_info::v1::client::zcosmic_toplevel_handle_v1::State;
 use futures::future::pending;
 use iced::{Alignment, Background, Length};
-use std::{borrow::Cow, collections::HashMap, path::PathBuf, rc::Rc, str::FromStr, time::Duration};
+use rustc_hash::FxHashMap;
+use std::{borrow::Cow, path::PathBuf, rc::Rc, str::FromStr, time::Duration};
 use switcheroo_control::Gpu;
 use tokio::time::sleep;
 use url::Url;
@@ -327,12 +328,12 @@ struct CosmicAppList {
     wayland_sender: Option<Sender<WaylandRequest>>,
     seat: Option<WlSeat>,
     rectangle_tracker: Option<RectangleTracker<DockItemId>>,
-    rectangles: HashMap<DockItemId, iced::Rectangle>,
+    rectangles: FxHashMap<DockItemId, iced::Rectangle>,
     dnd_offer: Option<DndOffer>,
     is_listening_for_dnd: bool,
     gpus: Option<Vec<Gpu>>,
     active_workspaces: Vec<ExtWorkspaceHandleV1>,
-    output_list: HashMap<WlOutput, OutputInfo>,
+    output_list: FxHashMap<WlOutput, OutputInfo>,
     locales: Vec<String>,
     overflow_favorites_popup: Option<window::Id>,
     overflow_active_popup: Option<window::Id>,

cosmic-app-list/src/app.rs

@@ -17,6 +17,7 @@ i18n-embed-fl.workspace = true
 i18n-embed.workspace = true
 libcosmic.workspace = true
 rust-embed.workspace = true
+rustc-hash.workspace = true
 tokio.workspace = true
 tracing-log.workspace = true
 tracing-subscriber.workspace = true

cosmic-applet-battery/Cargo.toml

@@ -40,7 +40,8 @@ use cosmic_settings_subscriptions::{
 };
 use cosmic_time::{Instant, Timeline, anim, chain, id};
 
-use std::{collections::HashMap, path::PathBuf, sync::LazyLock, time::Duration};
+use rustc_hash::FxHashMap;
+use std::{path::PathBuf, sync::LazyLock, time::Duration};
 use tokio::sync::mpsc::UnboundedSender;
 
 // XXX improve
@@ -80,7 +81,7 @@ struct CosmicBatteryApplet {
     charging_limit: Option<bool>,
     battery_percent: f64,
     on_battery: bool,
-    gpus: HashMap<PathBuf, GPUData>,
+    gpus: FxHashMap<PathBuf, GPUData>,
     update_trigger: Option<UnboundedSender<()>>,
     time_remaining: Duration,
     max_kbd_brightness: Option<i32>,

cosmic-applet-battery/src/app.rs

@@ -14,6 +14,7 @@ i18n-embed.workspace = true
 libcosmic.workspace = true
 fastrand = "2.3.0"
 rust-embed.workspace = true
+rustc-hash.workspace = true
 tokio.workspace = true
 tracing-log.workspace = true
 tracing-subscriber.workspace = true

cosmic-applet-bluetooth/Cargo.toml

@@ -1,8 +1,9 @@
 // Copyright 2023 System76 <[email protected]>
 // SPDX-License-Identifier: GPL-3.0-only
 
+use rustc_hash::FxHashMap;
+
 use std::{
-    collections::{HashMap, HashSet},
     fmt::Debug,
     hash::Hash,
     mem,
@@ -357,7 +358,7 @@ pub struct BluerSessionState {
     wake_up_discover_tx: Sender<()>,
     wake_up_discover_rx: Option<Receiver<()>>,
     tx: Sender<BluerSessionEvent>,
-    active_requests: Arc<Mutex<HashMap<BluerRequest, JoinHandle<anyhow::Result<()>>>>>,
+    active_requests: Arc<Mutex<FxHashMap<BluerRequest, JoinHandle<anyhow::Result<()>>>>>,
 }
 
 impl BluerSessionState {
@@ -540,7 +541,7 @@ impl BluerSessionState {
             wake_up_discover_rx: Some(wake_up_discover_rx),
             wake_up_discover_tx,
             tx,
-            active_requests: Arc::new(Mutex::new(HashMap::new())),
+            active_requests: Default::default(),
         };
         self_.process_requests(req_rx);
         self_.process_changes();

cosmic-applet-bluetooth/src/bluetooth.rs

@@ -21,6 +21,7 @@ libcosmic = { workspace = true, features = [
     "desktop",
 ] }
 rust-embed.workspace = true
+rustc-hash.workspace = true
 tokio.workspace = true
 tracing-log.workspace = true
 tracing-subscriber.workspace = true

cosmic-applet-network/Cargo.toml

@@ -1,4 +1,4 @@
-use std::collections::HashSet;
+use rustc_hash::FxHashSet;
 use std::sync::LazyLock;
 
 use cosmic::{
@@ -107,7 +107,7 @@ struct CosmicNetworkApplet {
     timeline: Timeline,
     toggle_wifi_ctr: u128,
     token_tx: Option<calloop::channel::Sender<TokenRequest>>,
-    failed_known_ssids: HashSet<String>,
+    failed_known_ssids: FxHashSet<String>,
     hw_device_to_show: Option<HwAddress>,
 }