[Webkit-unassigned] [Bug 238310] New: Private Click Measurement unexpected report delay

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=238310

            Bug ID: 238310
           Summary: Private Click Measurement unexpected report delay
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: All
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cedelman at pinterest.com

Created attachment 455606

  --> https://bugs.webkit.org/attachment.cgi?id=455606&action=review

trend of delayed reports

It's expected attribution reports send after the 24-48 reporting delay window if Safari is closed. During testing it was discovered many reports were not delivered until roughly one month later. The graph below shows a trend of a trigger data value (gray line) over time after the value was removed from trigger logic on 1/25. It is a concern so many reports deliver after 48 hours. Has this behavior been reported from other PCM API users or internally during dev/testing?


- Is there a test/debug solution that can be built into PCM to track at a finer grain level to help debug? Current debug solutions automatically send reports which isn't helpful to test reporting delay.

- Event level reports that are received much later than 48 hours may not be useful for certain reporting use cases. Could reports older than a threshold outside the 48 hour window be dropped if desired, either by default or via a config set on the source event?

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