[oden] Tracing and also actual 60fps

Sleeping is completely and utterly unreliable.

src/script.rs

@@ -5,6 +5,7 @@ use oden_js::{
 use std::ffi::OsStr;
 use std::sync::mpsc::{channel, Receiver};
 use std::time::Instant;
+use tracy_client::span;
 
 pub mod graphics;
 use graphics::GraphicsCommand;
@@ -99,29 +100,41 @@ impl ScriptContext {
     //       game thread go to fast probably? And to discard whole frames &c.
 
     pub fn init(&mut self) {
+        let _span = span!("script init");
+
         self.init
             .call(&self.context, &[])
             .expect("Exception in init");
     }
 
     pub fn update(&mut self) {
+        let _span = span!("script update");
+
         // Do we update the frame time before of after async completion?
         // Hmmmmm.
         self.time.set_frame_time(Instant::now());
 
         // Tell the runtime to process all pending "jobs". This includes
         // promise completions.
-        self.context
-            .process_all_jobs()
-            .expect("Error processing async jobs");
+        {
+            let _span = span!("process jobs");
+            self.context
+                .process_all_jobs()
+                .expect("Error processing async jobs");
+        }
 
         // Now run the update function.
-        self.update
-            .call(&self.context, &[])
-            .expect("Exception in update");
+        {
+            let _span = span!("javascript update");
+            self.update
+                .call(&self.context, &[])
+                .expect("Exception in update");
+        }
     }
 
     pub fn render(&mut self) -> Vec<graphics::GraphicsCommand> {
+        let _span = span!("script render");
+
         self.draw
             .call(&self.context, &[])
             .expect("Exception in draw");