According to multiple user reports, the patch for the Google Pixel 2 XL that was issued two days ago made this flagship device slower when waking up from the sleep mode via both the power button and the fingerprint reader. Fortunately, it seems that no other Pixel or Nexus device has been affected by this bug.
https://www.notebookcheck.net/The-Google-Pixel-2-XL-got-lazy-after-the-latest-update.308034.0.html