Server side Gutenberg block add example cache

[nextendweb]

If you have a block which has render_callback, so rendered at server side and you define example in registerBlockType then every time when you move your mouse in the add panel over your block, a new request will be made to the server to render the module.

I think this is unnecessary overload to the server and you could cache the first response.

Screen recording: ​https://www.youtube.com/watch?v=PidSzymx73I