MD Bookmarks is already pretty good performance-wise, but there's always more that can be done.
Important groundwork:
1. Add a timing metric to measure how long it takes to display the page
Then, low-hanging fruit for performance:
1. Vulcanize and CSS-build the page
2. Enable gzip for vulcanized resources
3. cr-lazy-render or dom-if out anything which doesn't need to be rendered at startup
4. Replace folder iron-icons with lightweight div+svg
Then, if we need it:
1. Add a basic shim for super fast rendering of the toolbar/background
2. Split out a 'lazy load' bundle to improve first-paint time
3. Automatically close deeply nested folders to reduce the amount of work to paint the folder tree
Comment 1 by bugdroid1@chromium.org
, May 30 2017