Poor Performance on Mobile Device

[seanwu1105]

Extremely poor performance on mobile devices. Need time to investigate the root cause.

• It is highly possible that the Filesystem on the Android device is not fast enough to rapidly query multiple times.
  • Possible fix: merge the information tuples into a large json file.
  • Possible fix: use sqlite instead.
• Media data use base64 encoding to pass around instead of file object with source URI.

Roadmap

• Use <img /> instead of <ion-img> for better performance.
• Merge the information tuples into a large json file. This require new "equal" class to check the equality. Greatly add complexity.
• Call Storage.refresh$() only on initialization.
  • Remove calling Storage.refresh$() on Storage.add$().
  • Remove calling Storage.refresh$() on Storage.remove$(). This require new "equal" class to check the equality. Greatly add complexity.
• Generate the thumbnail of the media asset on captured.