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systemEntropy addition to PerformanceNavigationTiming #878
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We haven't had a chance to dive into this thoroughly yet, but first impressions:
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Thanks for the feedback.
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Possibly, but also that a site may be able to fingerprint a user and tell it's the same user on multiple visits. We also have concerns about other information leakage, for example there's work being done to hide usage of local cache. E.g. loading a resource from a cache but pretending that it's coming from the network (and adding an artificial delay), being able to measure the entropy may reveal this is happening. Basically, we like to be sure people who understand these kinds of issues better have reviewed this. |
My apologies for the delayed reply. I'm working with the WebPerfWG to ensure that this information is exposed in a way that conforms with the privacy principles outlined here: https://docs.google.com/presentation/d/19TOz4mXRsYt8tkqzH8io_BrYiZBXhqGyD646gJy-x6I/edit#slide=id.p |
Thanks, @mwjacksonmsft — we'll wait to hear back from you then. |
I'm requesting a TAG review of systemEntropy addition to PerformanceNavigationTiming.
This proposal adds a new ‘systemEntropy’ field to the PerformanceNavigationTiming struct enabling developers to discern if the page load occurs during a non-optimal performance state.
Further details:
You should also know that...
[please tell us anything you think is relevant to this review]
We'd prefer the TAG provide feedback as (please delete all but the desired option):
💬 leave review feedback as a comment in this issue and @-notify [mwjacksonmsft]
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