advanced-camera-card/docs/configuration/performance.md

performance

Configure the card performance settings to enable the card to run (more) smoothly on lower end devices.

performance:
  # [...]

Option	Default	Description
features		Configure feature settings that impact performance.
style		Configure style settings that impact performance.

features

Controls card-wide functionality that may impact performance.

performance:
  features:
    # [...]

Option	Default	Description
animated_progress_indicator	true	Will show the animated progress indicator 'spinner' when true or a simple loading icon when false.
media_chunk_size	50	How many media items to fetch and render at a time (e.g. thumbnails under a live view, or number of snapshots to load in the media viewer). This may only make partial sense in some contexts (e.g. the 'infinite gallery' is still infinite, it just loads thumbnails this many items at a time) or not at all (e.g. the timeline will show the number of events dictated by the time span the user navigates to).

style

Style performance options request the card minimize certain expensive CSS stylings. This does not necessarily disable these stylings entirely since that may break the basic expected visuals of the card (e.g. menu icons need curves), but rather avoids use of them in high item-count situations (e.g. avoiding shadows on timeline items, or curves in the media gallery items).

performance:
  style:
    # [...]

Option	Default	Description
border_radius	true	If false minimizes the usage of rounded corners.
box_shadow	true	If false minimizes the usage of shadows.

The low-performance profile

For low end devices, the low-performance profile will adjust card defaults to attempt to improve performance. See the profiles configuration option for details on how to select profiles.

Fully expanded reference

performance:
  features:
    animated_progress_indicator: true
    media_chunk_size: 50
  style:
    border_radius: true
    box_shadow: true