Unfortunately, you canβt do it to speed up the development mode update time, 6-10 seconds is not a terrible amount of time (especially against using Dev mode and performing a full recompilation every time).
If you have not tried code splitting yet, you will almost certainly see a decrease in recompilation time and a decrease in page load time in general, after deploying your application. But apart from this, I canβt think of anything that would drastically reduce the Dev mode update time.
Jason hall
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