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 'spinners' when true.
card_loading_effects	true	Will occasionally show (silly) visual effects during card loading (e.g. fireworks on New Year's Day).
card_loading_indicator	true	Will show the card loading indicator (spinner & version number) and effects (see card_loading_effects below) when true.
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, and folders always show every matching item).
max_simultaneous_engine_requests	Infinity	How many camera engine requests to allow occur in parallel. Setting lower values will slow the card down since more requests will run in sequence, but it will increase the chances of positive cache hit rates and reduce the chances of overwhelming the backend.

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
    card_loading_effects: true
    card_loading_indicator: true
    media_chunk_size: 50
    max_simultaneous_engine_requests: 100
  style:
    border_radius: true
    box_shadow: true