@remotion/web-renderer: Skip very compressed transforms for performance#6202
Merged
JonnyBurger merged 1 commit intomainfrom Jan 3, 2026
Merged
@remotion/web-renderer: Skip very compressed transforms for performance#6202JonnyBurger merged 1 commit intomainfrom
@remotion/web-renderer: Skip very compressed transforms for performance#6202JonnyBurger merged 1 commit intomainfrom
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Pull request overview
This PR adds a performance optimization to handle extremely compressed transforms in the web renderer. When transforms compress an axis to near-zero scale (e.g., rotating 89.96° around the X-axis), the inverse matrix calculation can become numerically unstable or explode, causing performance issues. The PR detects these cases early and returns an empty rect, avoiding unnecessary computation for nearly invisible content.
Key Changes
- Added compression detection logic that checks if any axis is compressed below 1/100 of original scale
- Added comprehensive test case with many layers containing complex 3D transforms
- Early return for compressed transforms prevents expensive matrix inversions
Reviewed changes
Copilot reviewed 4 out of 7 changed files in this pull request and generated no comments.
Show a summary per file
| File | Description |
|---|---|
packages/web-renderer/src/drawing/get-pretransform-rect.ts |
Added scale factor checking to detect and skip very compressed transforms |
packages/web-renderer/src/test/many-layers.test.tsx |
New test case for rendering performance with many layers |
packages/web-renderer/src/test/fixtures/many-layers.tsx |
Test fixture with complex nested transforms and multiple layers |
packages/web-renderer/src/test/Root.tsx |
Registered new test composition in the root component |
packages/web-renderer/src/test/__screenshots__/* |
Screenshot baseline files for visual regression testing |
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