Performance benefits with Styles

By design, Styles operate in the layout and drawing phase of Compose. This avoids the need to create lambda-based modifiers as Styles always skips the composition phase.

Figure 1. Phases of Compose and where Styles run.

The performance improvements over modifiers come from three primary optimizations:

• Phase shifting: Styles often target the Draw phase. When a value changes, Compose invalidates only the affected phase (e.g., Redraw) instead of triggering a full Recomposition or Relayout.
• Lazy allocation: Styles defer animation resource allocation until an animation actually starts. This reduces the work required during initial composition.
• Reduced object overhead: Chained modifiers allocate an object for every property (e.g., padding, border). Styles use a single lambda to apply multiple properties, significantly reducing memory allocations. If a Style is defined in a theme, that lambda is shared across all components using that theme.

The following table shows illustrative results of an internal performance benchmarks for Compose 1.11.0-alpha06 of Styles, in comparison to an implementation in Compose without Styles.

The basic_box_border_change test highlights the style system's strength in avoiding the allocation of multiple modifier objects during property updates, resulting in a massive ~77% reduction in allocations, and ~59% reduction in time.

Test Method	Description	Time Change	Allocation Change
basic_box_border_change	Toggles the border color of a Box to measure update performance.	-59.91%	-77.22%
input_state_basic_box	Compares style-based hover/focus/press states vs. manual interaction state collection.	-5.24%	-14.72%
basic_box	Measures initial composition and layout of a Box with five chained modifiers.	-4.78%	-6.60%
basic_text	Renders five BasicText components with hardcoded strings.	+0.62%	+2.41%
basic_text_provided_color	Compares setting text color via a style vs. using CompositionLocalProvider.	+5.86%	+9.82%