Re: [w3ctag/design-reviews] confidence reporting for PerformanceNavigationTiming (Issue #878)

mwjacksonmsft left a comment (w3ctag/design-reviews#878)


Thank you for sharing your thoughts. 


Could you please elaborate on your concerns, particularly in terms of the potential abuses you foresee? 

> Making the "confidence" parameter noisy only makes it necessary to collect multiple samples (epsilon values increase over multiple observations, eliminating noise). It seems to me like you want to encourage sites to take multiple observations across a user population rather than of a single user, but there are no inbuilt systems that prevent abuse.


The proposed "confidence" attribute does not rely on any device-specific information. It is designed to ensure that the attribute is a hint to reflect the reliability of the metrics. Using your example:

> A site visitor in the slowest 10% of visitors to one site is probably also in the slowest 10% of visitors to another site.

For the majority of site loads on this device, I'd expect the API to return a high confidence value (if no noise were added). 




-- 
Reply to this email directly or view it on GitHub:
https://github.com/w3ctag/design-reviews/issues/878#issuecomment-2960164084
You are receiving this because you are subscribed to this thread.

Message ID: <w3ctag/design-reviews/issues/878/2960164084@github.com>