As early as October 2020, with the release of Chrome 86, Google introduced a new item called “Native Window Occlusion” to all Chrome installation systems on Windows. Feature, the company has now announced the performance improvements brought about by this feature in a new blog post on the Chromium website.
“Local window masking” can control the priority of the background label to reduce the resource usage of the browser , and “more memory, CPU and GPU are reserved for the foreground label”.
Google engineers noticed that some Chrome windows are completely covered by other windows, but their priority is not lowered. Google’s “local window shading” function is to improve the performance of the browser. Google pointed out that “nearly 20% of Chrome windows are completely covered by other windows.”
Google said: “Through experiments, we found that nearly 20% of Chrome browser windows are completely covered by other windows, that is, blocked. If these blocked windows are used as background labels, our assumption is that we will see obvious Therefore, about three years ago, we began to study a project to track the occlusion status of each Chrome window in real time, and reduce the priority of tags in the occluded window. We call this project “local window occlusion” , Because we have to know the location of the local non-Chrome window on the user’s screen.”
Chrome now monitors the occlusion status of each browser window in real time to reduce the priority of open tabs in fully occluded windows on Windows.
According to Google, the performance of the core areas has been significantly improved due to the masking check function enabled on Windows:
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The startup speed has increased by 8.5% to 25.8%.
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GPU memory usage decreased by 3.1%.
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The overall number of frames drawn by the renderer has been reduced by 20.4%.
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The number of customers experiencing renderer crashes decreased by 4.5%.
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The first input delay is reduced by 3.0%.
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The speed of the first content drawing and the maximum content drawing has been increased by 6.7%.
All these benefits require Chrome users to have at least two Chrome browser windows open on their devices, and one of the windows is completely obscured on the desktop.
Naijatechnews understands that the “local window shading” function is only available in the Windows version of the Chrome browser. Google did not disclose whether the feature will be introduced to Chrome for Mac OS and Linux in the future.
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