Interaction to Next Paint Changes in Chrome 112

Patched the following issues with the flush timer in Event Timing

Issue 1 - Intermittent single tap triggers double interactions

• When tapping on a page with no event handlers, a single tap could sometimes trigger event timing reports pointerup & click events with different interactionIDs.

Issue 2 - Duplicate reporting of pointerdown events

• Event timing reports the same pointerdown entry twice when the click event is prevented from a touch input. (eg. registering a touchStart handler that invokes preventDefault.)

Both issues were patched in this change.

How does this affect a site's metrics?

INP durations values will not change, however total measured number of interactions might (rarely) decrease, and this might affect measurement only on pages with > 50 interactions.

When were users affected?

Chrome 112 was released the week of April 04, 2023.