Improve search performance

[jplitza]

General information

• Operating system + version: Ubuntu 18.04
• Browser + version: Firefox 70
• Information about the host app:
  • How did you install it? Prebuilt binary IIRC
  • If installed an official release, put a version ($ browserpass --version): Browserpass host app version: 3.0.6
  • If built from sources, put a commit id ($ git describe --always):
• Information about the browser extension:
  • How did you install it? Downloaded from addons.mozilla.org
  • Browserpass extension version as reported by your browser: 3.4.1

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Exact steps to reproduce the problem

1. Create a password store with over a thousand files in many nested directories. Randomized example that you can use:

   mkdir .password-store
   cd .password-store
   curl -L 'https://github.com/browserpass/browserpass-extension/files/3843126/find.txt' | while read f; do mkdir -p $(dirname "$f") && touch "$f"; done
   

2. Use the search

What should happen?

It's amazingly fast! :sparkles:

What happened instead?

It takes over a second to initially load, and removing the domain filter as well as the first keypresses of the incremental search over all items takes ages.