Intent to Extend Origin Trial: performance.measureMemory
Ulan Degenbaev
Contact emails
Spec
https://github.com/WICG/performance-measure-memory
Summary
The performance.measureMemory API allows web pages to measure their memory usage.
Link to “Intent to Prototype” blink-dev discussion
https://groups.google.com/a/chromium.org/d/msg/blink-dev/cdUOyBAtWzo/MRmGAURjBQAJ
Goals for experimentation
We’re looking for feedback on API usefulness and performance.
To evaluate usefulness we will rely on the feedback from developers comparing the new API with the existing non-standard performance.memory API. We are specifically interested in accuracy and variability of the measurement results returned by the API.
To evaluate performance we will use V8 GC latency metrics.
The Origin Trial will be limited to JavaScript memory on site-isolated pages. Shipping of the API will be gated by COOP+COEP. See the launch bug: https://crbug.com/1048745 for the security discussion.
Experimental timeline
The extension will be to extend the experiment for one more milestone so that it ends in M87 instead of M86.
Any risks when the experiment finishes?
No.
Reason this experiment is being extended
Previous Intent to Experiment: https://groups.google.com/a/chromium.org/d/msg/blink-dev/zxCKzulX424/Ac3zzMqqAQAJ
Previous Intent to Extend Origin Trial:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/LuoryMqT7wQ/DEiG_IpAAgAJ
Reasons:
- Due to a bug in the implementation, the origin trial was disabled for M84 and most of M85. We are just starting to get data from the experiment.
- M87 extends to the scope of the API to include worker memory. We would like to test and get data for that.
Ongoing technical constraints
None.
Will this feature be supported on all five Blink platforms supported by Origin Trials (Windows, Mac, Linux, Chrome OS, and Android)?
The experiment will be limited only to platforms that have Site Isolation because that is necessary for security.
Link to entry on the feature dashboard
https://www.chromestatus.com/feature/5685965186138112
Yoav Weiss
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