WIP: optimizations for linux

src/app.rs

@@ -1,8 +1,9 @@
+use parking_lot::Mutex;
 use rand::rngs::StdRng;
 use rand::SeedableRng;
 use std::collections::HashMap;
 use std::path::PathBuf;
-use std::sync::{Arc, Mutex};
+use std::sync::Arc;
 
 use crossbeam_channel::Sender;
 
@@ -605,8 +606,8 @@ impl App {
                 link.set_tempo(tempo);
 
                 self.playback.clear_queues();
-                self.variables.lock().unwrap().clear();
-                self.dict.lock().unwrap().clear();
+                self.variables.lock().clear();
+                self.dict.lock().clear();
 
                 for (bank, pattern) in playing {
                     self.playback.queued_changes.push(StagedChange {