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[Chess] Use time-based animation values and dynamic OKLCH palette - #119
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kraskevich wants to merge 1 commit into
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In the current Chess subtest, `--anim-value` is incremented by `1` on each `animate()` call and passed through `mod(var(--anim-input), 400) * 1grad` against a fixed 5-color OKLCH palette. Why this matters: - Driving animation progress from a frame counter (`++this._animValue`) rather than elapsed time (`performance.now()`) couples the visual speed of the workload to the display refresh rate and frame drops (e.g., running twice as fast at 120 Hz as at 60 Hz), whereas real web animations advance as a continuous function of elapsed time. - Stepping an integer modulo 400 against a static palette restricts every leaf's conic and linear gradient to 400 discrete states across the entire benchmark run. An engine can cache or pre-bake those 400 resolved gradient states after the first few seconds instead of evaluating dynamic CSS gradients and `color-mix()` styles each frame. Using continuous floating-point elapsed time and modulating the stage's OKLCH palette channels over time ensures the subtest measures ongoing CSS color/gradient evaluation and rasterization while preserving `contain: strict` and static glyph masks.
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In the current Chess subtest,
--anim-valueis incremented by1on eachanimate()call and passed throughmod(var(--anim-input), 400) * 1gradagainst a fixed 5-color OKLCH palette.Why this matters:
++this._animValue) rather than elapsed time (performance.now()) couples the visual speed of the workload to the display refresh rate and frame drops (e.g., running twice as fast at 120 Hz as at 60 Hz), whereas real web animations advance as a continuous function of elapsed time.color-mix()styles each frame. Using continuous floating-point elapsed time and modulating the stage's OKLCH palette channels over time ensures the subtest measures ongoing CSS color/gradient evaluation and rasterization while preservingcontain: strictand static glyph masks.