Hello everyone, we're going to start using this group to post updates on general web perf API changes and quarterly progress, hope you find this useful! Here is our 2021 Q2 (second quarter) progress as well as our objectives for in-progress Q3.
Q2 progress (looking at objectives from https://chromium.googlesource.com/chromium/src/+/main/docs/speed_metrics/webperf_okrs.md )
Responsiveness: published blog post on our progress and current work.
Launched redefined (window-based) Cumulative Layout Shift.
Integrated Resource Timing into Fetch spec.
Improved abandonment rate computations on Chrome by considering bf cache navigations.
Finalized API shape for droppedEntriesCount.
Q3 objectives
Ship bf cache support for certain web performance APIs
Blog post on CWV measurement on SPA
Devise heuristic to distinguish between low and high content images for LCP
Continue investigation on progressive images and LCP
Implement interactionID behind a flag in Event Timing
Implement Scroll Timing to expose scroll-begin, behind a flag
Ship JS Sampling Profiler
Implement and ship droppedEntriesCount
Publish an Explainer for a Smoothness metric (potentially with a strawman API proposal). Provide motivating examples from experiments.