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I have a prototype with a lot of connections but overall the file is small (11%).
Although the prototype lags, loads slowly, and triggers the ‘unable to load…’ browser notification.

  • There are no images within the file
  • Most animations are ‘smart animate’

I’ve run into performance issues due to the complexity of vector images—having multiple detailed vectors on a single frame didn’t affect the file size, but it significantly slowed down prototype rendering. In presentation mode, I couldn’t scroll smoothly up and down the screen.

I only discovered the cause after gradually removing elements from the frame and realized that my icons (which had complex vector paths) were the source of the lag.

Hope this helps!