Optimize frequent path

Author: Lucas Paixão

src/runtime/context.rs

@@ -60,6 +60,11 @@ impl RuntimeContext {
     roc.dispatch_completions()
   }
 
+  pub(crate) fn flush(&self) {
+    let roc = unsafe { &*self.driver.as_ptr() };
+    let _ = roc.flush();
+  }
+
   #[inline(always)]
   pub(crate) fn call_on_thread_park(&self) {
     self.on_thread_park.get()();

src/runtime/mod.rs

@@ -146,7 +146,7 @@ impl Runtime {
 
   fn on_thread_park() {
     CONTEXT.with(|x| {
-      let _ = x.handle().flush();
+      x.flush();
     });
   }