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Investigate increase for start render enwiki mobile 2020-01-09
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Description

Looking at WebPageTest it looks like this:
Obama:

Screen Shot 2020-01-12 at 6.18.34 PM.png (1×1 px, 153 KB)

Facebook:
Screen Shot 2020-01-12 at 6.18.53 PM.png (1×1 px, 141 KB)

For the Sweden article the change happened later:
Screen Shot 2020-01-12 at 6.19.25 PM.png (1×1 px, 141 KB)

No change in ttfb what I could see. I couldn't see the same change for the WebPageReplay tests.

Event Timeline

This seems to correlate to 1.35.0-wmf.14 (the red line is when deployed):

Screen Shot 2020-01-13 at 8.21.17 AM.png (1×1 px, 116 KB)

Let me check if we can see anything in RUM.

Aklapper subscribed.

Removing task assignee due to inactivity, as this open task has been assigned for more than two years. See the email sent to the task assignee on February 06th 2022 (and T295729).

Please assign this task to yourself again if you still realistically [plan to] work on this task - it would be welcome.

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Long time overdue, nothing to do here now.