diff --git a/README.md b/README.md
index d6c1421..ced1266 100644
--- a/README.md
+++ b/README.md
@@ -16,3 +16,11 @@ This is a template for an emscripten project with a "Rust backend".
 ## Build
 
 Just run `make` in the root of this project.
+
+## Other Notes
+
+The current set up of the update/draw loop uses
+`emscripten_set_main_loop_arg(...)` with parameters that should call the
+browser's `requestAnimationFrame` that should call `update` and `draw` once per
+each frame at the fps that the browser decides, which should match the fps of
+your display.