| Aoyuan Zuo | d8abb142a | 2024-08-14 01:04:19 | [diff] [blame] | 1 | # Interaction to Next Paint Changes in Chrome 128 |
| 2 | |
| 3 | ## Enable EventTimingHandleOrphanPointerup by default |
| 4 | |
| 5 | Although INP is not intended to measure scrolling performance, there were |
| 6 | certain sequences of Event dispatch where Event Timing unintentionally would |
| 7 | sometimes measure what would ultimately be a scroll starting interaction. We're |
| 8 | excluding these scroll starting interactions from INP measurement with this |
| 9 | change. |
| 10 | |
| 11 | Note: this experiment was first landed in Chrome 125: [Treat Orphan Pointerup |
| 12 | As Non-Interaction](https://chromium.googlesource.com/chromium/src.git/+/9d3f759094b33ae52dd99e44b182ab03bf0e8073), and was slowly rolled out. |
| 13 | |
| 14 | ## How does this affect a site's metrics? |
| 15 | |
| 16 | Sites previously affected by scroll starting interactions may observe a drop in |
| 17 | number of interactions and an improvement on INP score since high outliers |
| 18 | result from scrolling during early loading are now excluded from INP |
| 19 | measurement. |
| 20 | |
| 21 | ## When were users affected? |
| 22 | |
| 23 | Chrome 128 will be released the week of August 20, 2024. |