There are no bulk operations at the moment. But even if there were (I assume you are using the backend API) it might still be too slow for a < 30ms response time which is required for a snappy, responsive feeling.
So you might have to implement some caching anyway. E.g. periodically load the
#Snippet tag and check for any new
Another option is to download a JSON backup and operate on that. Depending on how frequently you modify snippets a manual download might be enough. For Roam there are tools using Puppeteer to do it automatically, e.g. daily. This should work for RemNote too I think. If you are using the desktop app the backups are generated daily in your Documents folder automatically.
Still another option would be to use a frontend plugin connected to a
localhost server (opened in an additional browser tab to be loaded all the time). See GitHub - hannesfrank/remnote-local-server: A quick&dirty demo of how to communicate between RemNote and the OS using the Frontend API. for a demo of the architecture.
This is really fast since no http requests to RemNote servers are required. And it also works on local-only KBs as well.
RemNote’s extension system is currently reworked so there might be some progress here the next month or two.