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+- Document implementation
+- Switch to labelled interface
+- Make "window manager" a core Nottui concept:
+  - applications start by creating a window manager
+  - main loop runs a window manager and not a ui Lwd.t
+  - main loop quit when there is no window scheduled
+- Benchmark "compact" trace representation:
+  It should consume a bit less memory (that should be observable in misc
+  example with a million edit fields) and should not affect runtime
+  performance... However it seems to do so (in misc and stress),
+  especially in bytecode, maybe because of the additional recursive functions.
+- Add a standard mainloop / update scheduler to Tyxml-lwd:
+  - it should take into account different roots 
+    (multiple sub-trees of the DOM that are maintained by lwd)
+  - it should support "unstable" documents (those that need more than one
+    update cycle):
+    - provide different levels of logging for profiling unstable parts?
+    - maybe split update cycles in different chunks, so that we can still
+      produce a frame within time budget when a fixpoint cannot be reached