Streamlit scripts take a long time to transfer data

[tvst]

Streamlit scripts take a long time to transfer data

[jrhone]

We're calling render for each protobuf received, so on a re-run of the script we're doing 1000 renders and reconciling against 1000 components. Seems to be too much work for the client to handle, classic long list problem.

Areas of performance improvement

• ReactMarkdown is relatively slow
• ErrorBoundary and Suspense components take up fair bits of time

Potential Solutions

• Proper component diffing when no elements have changed: handle reportId busting the comparison on each new report, and ensure ImmutableJS is playing nice with PureComponent
• Bundle received protobuf messages and batch update the state

[jrhone]

Waiting on Emiliano's re-render improvements to land to see how much performance gains we get.
Waiting on Tim's hashing changes to drop before Emiliano can finish.