Stress test

[progrium]

use devtools performance insights for page load and update profiling. first use localstorage. then try with github backend.

• 2000 sibling nodes, compare rendering perf of textarea editor vs codemirror editor
• generate child nodes for 2000 nodes
  • half small profile (20 nodes)
  • half large profile (150 nodes)
  • what feels slow? how is initial load? expanding 2000 children? how long does save take?
  • same test but 2000 document nodes
• 50 nodes each with 50 nodes, each with 50 (50x50x50) for 125k nodes
• what feels slow? anything break? differences between browsers?