PageSpeed见解于2020年5月27日进行了升级 [英] PageSpeed insights went through upgrade as on 27th May 2020

问题描述

https://developers.google.com/speed/pagespeed/insights/

在2020年5月27日，我使用了页面速度，在台式机(90+)和移动端(85+)上都获得了不错的成绩，但是截至2020年5月28日，指标似乎发生了巨大变化，我可以看到PageSpeed具有新版本(v6)，但此处没有提供适当的发行说明 https://developers.google.com/speed/docs/insights/release_notes .

On 27th May 2020 I had used page speed where I got a pretty good score for desktop (90+) and for mobile around (85+), but as on 28th May 2020 the metrics seems to drastically changed, I can see the PageSpeed has new version (v6) but no proper release notes are provided here https://developers.google.com/speed/docs/insights/release_notes.

任何人都遇到过类似的问题，并且发现google pagespeed确实进行了某些升级，然后请向我提供一些参考.

Anyone had faced similar issue and found that google pagespeed did undergo certain upgrades then please provide me some references if possible.

推荐答案

经过一番挖掘，我设法找到了建议的计分权重草案.

After some digging I managed to find the draft of the proposed scoring weights.

https://web.dev/performance-scoring/?utm_source=灯塔& utm_medium = wpt

分数的大幅度变化取决于权重的变化方式

The large shift in scores is down to how the weightings have changed

• 第一种含量15％的油漆
• 速度指数15％
• 最大含量25％的油漆
• 互动时间15％
• 总阻止时间25％
• 累计版式偏移5％

• 第一种内容丰富的油漆20％
• 速度指数27％
• 第一种有意义的涂料7％
• 互动时间33％

如您所见，重点转移到了总阻止时间 (TBT)(主要是JavaScript执行时间)以及最大的内容绘画(LCP)发生的时间(大概是因为这表明页面布局中的较大变化/可能分散注意力的可见内容/很好地指示了折叠内容何时完全加载(而不是显示旋转").

As you can see there is a massive shift to emphasis on Total Blocking Time (TBT) (JavaScript execution time mainly) and when the Largest Contentful Paint (LCP) occurs (presumably as this indicates large shifts in the page layout / visible content that may be distracting / is a good indicator of when the above the fold content is fully loaded (as opposed to showing a 'spinner')).

他们还添加了第三个新指标累积布局偏移(CLS)，该指标可以计算出页面布局四处移动".目前，它的权重较低，但是我认为这是确保所有延迟加载的资产都被捕获，从而影响首屏"内容并可能造成沮丧的更大计划的一部分(尝试单击链接以查找广告)加载并移动它).

They have also added a third new metric Cumulative Layout Shift (CLS), a metric that works out how much the page layout 'moves around'. This has a low weighting at the moment but I imagine it is part of a larger plan to ensure all late-loading assets are captured that affect the 'above the fold' content and may cause frustration (trying to click a link to find an advert loaded in and moved it for example).

权重的巨大变化和新指标的引入是您可能会遇到分数大幅下降的原因.

These huge changes in weightings and introduction of new metrics are the cause of massive score decreases you may experience.

我可以确认，我曾经获得99分或100分的网站现在仅获得87分，因此，他们的得分方式确实发生了很大变化.现在，他们似乎也考虑到了SVG渲染，因为我的网站是100％SVG驱动的，但在LCP上得分较低，这是他们最初并未考虑LCP统计信息的原因.

I can confirm that my site that used to score 99 or 100 now only scores 87 so it is indeed a large shift in how they are scoring. They also now seem to take into account SVG rendering as my site is 100% SVG driven yet scores low on the LCP, this is something they did not initially take into account with the LCP stats.

现在重点关注我在TBT和LCP上链接的两篇文章，因为它们是他们选择强调占总分50％的新指标.

For now focus on the two articles I linked on TBT and LCP as those are the new metrics they are choosing to emphasise making up 50% of your score.

OP在评论中指出，新PSI v6的主要更改位于此处

As OP pointed out in the comments the main changes for the new PSI v6 are located here

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