makepad-2.0-performance

Makepad batches draw calls by shader type, so text can render behind a sibling or parent background. Add new_batch: true to the View with show_bg: true to force a new draw batch with correct ordering.

Hover animations that transition a background from transparent to opaque cover batched text. Set new_batch: true on the hoverable View and on its parent container so each item renders its background and text in one batch.

The Splash VM uses a mark-sweep GC with per-type heaps that trigger when a category doubles since the last cycle and exceeds minimum thresholds. Use mod.gc.set_static() for permanent UI trees and mod.gc.run_status() to inspect heap statistics.

Use PortalList for lists with 100 or more items because it virtualizes rendering so only visible items are drawn. A manual loop inside ScrollYView draws every item each frame, causing scroll stuttering and high memory use.

new_batch creates a new DrawList2d to fix draw ordering within a subtree, while texture_caching renders children to an offscreen GPU texture to skip re-rendering unchanged content. If both are set, texture_caching takes precedence.

Calling .render() inside loops or on the root view rebuilds large widget subtrees repeatedly. Batch state changes first, then call .render() once on only the affected sub-view.