perf: replace rand with fastrand

Author: Cheong-Lau

Cargo.lock

@@ -16,7 +16,7 @@ image = { version = "0.25.8", default-features = false }
 itertools = "0.14.0"
 libcosmic.workspace = true
 memmap2 = "0.9.8"
-rand = "0.9.2"
+fastrand = "2.3.0"
 rust-embed.workspace = true
 rustix.workspace = true
 switcheroo-control = { git = "https://github.com/pop-os/dbus-settings-bindings" }

cosmic-app-list/Cargo.toml

@@ -54,7 +54,6 @@ use cosmic_protocols::toplevel_info::v1::client::zcosmic_toplevel_handle_v1::Sta
 use futures::future::pending;
 use iced::{Alignment, Background, Length};
 use itertools::Itertools;
-use rand::{Rng, rng};
 use std::{borrow::Cow, collections::HashMap, path::PathBuf, rc::Rc, str::FromStr, time::Duration};
 use switcheroo_control::Gpu;
 use tokio::time::sleep;
@@ -1084,8 +1083,7 @@ impl cosmic::Application for CosmicAppList {
                         }
                         self.active_list.clear();
                         let subscription_ctr = self.subscription_ctr;
-                        let mut rng = rng();
-                        let rand_d = rng.random_range(0..100);
+                        let rand_d = fastrand::u64(0..100);
                         return iced::Task::perform(
                             async move {
                                 if let Some(millis) = 2u64

cosmic-app-list/src/app.rs

@@ -12,7 +12,7 @@ futures.workspace = true
 i18n-embed-fl.workspace = true
 i18n-embed.workspace = true
 libcosmic.workspace = true
-rand = "0.9"
+fastrand = "2.3.0"
 rust-embed.workspace = true
 tokio.workspace = true
 tracing-log.workspace = true

cosmic-applet-bluetooth/Cargo.toml

@@ -24,7 +24,6 @@ use cosmic::{
 };
 
 use futures::{FutureExt, stream::FuturesUnordered};
-use rand::Rng;
 use tokio::{
     spawn,
     sync::{
@@ -397,8 +396,7 @@ impl BluerSessionState {
                             ),
                         ))
                         .await;
-                    let mut rng = rand::rng();
-                    let pin_code = rng.random_range(0..999999);
+                    let pin_code = fastrand::u32(0..999999);
                     Ok(format!("{:06}", pin_code))
                 })
             })),
@@ -437,8 +435,7 @@ impl BluerSessionState {
                             ),
                         ))
                         .await;
-                    let mut rng = rand::rng();
-                    let pin_code = rng.random_range(0..999999);
+                    let pin_code = fastrand::u32(0..999999);
                     Ok(pin_code)
                 })
             })),