Comparison between error-diffusion dithering and ordered dithering. Left to right: error-diffusion, ordered.
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，这一点在搜狗输入法2026中也有详细论述
The root cause? We drive Chrome's rendering loop frame-by-frame rather than letting it render freely. If no frames are issued for a while, internal buffers go stale. The fix is a warmup loop that continuously issues "skip frames" at ~30fps while waiting for the page to signal it's ready to record:
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Percentile 99: 228.76 ms | 123.967 ms