Dragging a band of a Filter or a Parametric EQ ran at about 30 fps
in a large project. Each frame of a drag announces the changed
project, and every listener of that event ran, also those whose work
nobody sees while the drag goes on.
- FramePreview marks its own frame, read through isDragFrame().
- The Scene view behind another tab skips such a frame and draws on
coming back, as it already did while a game runs (#265).
- preloadProjectFiles skips it as well. It walks every asset and
checks every bake, which costs milliseconds in a large project.
- The command that ends a drag emits for itself, and a drag that
changes nothing ends with a plain preview, so both catch up then.
- This holds for every drag through FramePreview, the knobs of the
devices in the graph included.
Measured on stein2 with a copy of a project of 162 assets, a band of
a Parametric EQ dragged at 250 pointer moves a second for 3 s:
- Listeners per frame: 17 ms before, 7.4 ms after.
- Hidden Scene view: 814 ms before, 53 ms after.
- preloadProjectFiles: 514 ms before, 0.4 ms after.
- What is left is mostly the Hierarchy and Assets panels on screen
(about 3 and 1.3 ms a frame). They stay as they are.
Tests:
- Unit frame-preview, play-throttle: 29 passed (1 new)
- Counter-check: without the mark the new test fails
- e2e 34 (melektaus-atx): ALL PASSED, 136 checks
- Gate (melektaus-atx): CHECK EXIT 0, 288 files, 4417 tests
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
adminandClaude Opus 5.5
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