Compose 1.12 is now stable, shipped as part of the August 2026 Jetpack Compose release (BOM 2026.08.00), and it's a bigger release than the version bump suggests — a genuine performance win for a common pattern, real HDR/wide-gamut color support, and rich text finally landing in the basic text field API. Here's what actually matters if you're shipping Compose UI.
The headline number: up to 90% faster one-shot effects
The most immediately useful change: keyed SideEffect overloads now support efficient one-shot effects, reportedly running up to 90% faster than the equivalent LaunchedEffect pattern for the same use case. If your codebase leans on LaunchedEffect for simple, non-cancellable one-time side effects (firing an analytics event, triggering a one-off animation start), this is worth auditing — swapping to the new keyed SideEffect pattern where appropriate is a low-risk, meaningful win, especially in recomposition-heavy screens.
Graphics: MeshGradientPainter, HDR, and wider color
The new MeshGradientPainter API enables multi-point, organic color gradients — the kind of soft, blended background effect that used to require custom Canvas drawing or a third-party library. Alongside it, Wide Color Gamut (P3) and HDR rendering support is now enabled across the graphics pipeline, meaning colors defined outside the standard sRGB space are preserved rather than clipped — genuinely useful for apps doing photo/video work or rich brand visuals on the increasingly common wide-gamut displays. A new LayerOutsets API also lets a layer's visual bounds extend beyond its measured size, useful for glows and shadows that shouldn't get clipped at the component's edge.
Animation: DeferredTargetAnimation graduates from experimental
DeferredTargetAnimation is no longer experimental, and ships alongside new DeferredAnimatedContent and DeferredAnimatedVisibility composables. The practical benefit is gesture-driven transitions with seamless handoffs — think a drag gesture that smoothly hands off into a settling animation without a visible seam between "user-controlled" and "system-animated" motion, a pattern that previously required more manual coordination.
Text: rich formatting finally in BasicTextField
Rich-text formatting now works inside BasicTextField via SpanStyle and ParagraphStyle APIs — previously, rich formatting inside an editable text field required more workarounds than it should have. A new SelectionState API also gives programmatic control over text selection, useful for building custom text-editing UI. Separately, Credential Manager integration now enables native passkey and saved-credential prompts directly from Compose, which matters if you've been putting off passkey support because the integration felt bolted-on.
Layout and testing, briefly
The experimental Grid component gained named areas, letting you position children semantically ("header", "sidebar", "content") instead of by numeric row/column indices — a real readability win for complex 2D layouts once it stabilizes. On the tooling side, new test APIs hasPendingWork() and runWithoutImplicitWait() aim to reduce flaky and slow Compose UI tests by giving you more explicit control over when a test actually waits for pending work versus proceeding immediately. Compose's Time to Initial Display now reportedly matches Views-based apps, closing a gap that mattered for startup-sensitive screens.
What to actually do about this release
Bump to Compose BOM 2026.08.00 (note it requires compileSdk API 37 and AGP 9.1.1 minimum, so check your build config first), audit any LaunchedEffect usages doing simple one-shot work for the new keyed SideEffect pattern, and if your app handles photo or video content, look at whether wide-gamut/HDR support is worth enabling given your target devices. None of this is a breaking release in the way some past Compose upgrades have been — it's a genuinely additive one.