• use GHINBs or any other notebook extension in the web
• open a notebook file
• 🐢 notice how slow the notebook opens, it takes roughly a second for its contents to appear

The slowness is because of the fetching of "dynamic" resources. Fetching iframe resources takes ~300ms in average - that's why subsequent fetches of the same notebook are fast, but of a different notebook are slow.

Things that we should investigate

• Why is *.vscode-webview.net/ so slow? @joaomoreno
• San we reuse the same dynamic subdomain per notebook-type (or notebook extension)? That would mean only the first load of a notebook of a type is slow, not all @mjbvz @rebornix