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#150 (comment)
Describe what the PR does
State whether the PR is ready for review or whether it needs extra work
Worth a review now. It's difficult to measure the performance. But plan to also optimise the TranscriptEditor component and it's settings / high level state to stop those rendering also.
Additional context
For testing performance with long media, best to review via:
This is because
npm start
will use the development build of React, which is a lot slower, and not a correct comparison if testing with what's on the GH pages.