From 3190e17e272ac866c739e6de4af466f67c73593d Mon Sep 17 00:00:00 2001 From: sware <91268027+swaretech@users.noreply.github.com> Date: Thu, 21 Nov 2024 10:15:47 -0500 Subject: [PATCH] Update rum-synth.rst Clarifying Web Vitals definitions for INP and TBT --- synthetics/test-config/rum-synth.rst | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/synthetics/test-config/rum-synth.rst b/synthetics/test-config/rum-synth.rst index cf8b1514e..7af821178 100644 --- a/synthetics/test-config/rum-synth.rst +++ b/synthetics/test-config/rum-synth.rst @@ -21,11 +21,11 @@ Splunk Synthetic Monitoring automatically collects Web Vitals for Browser tests. - Measures loading performance by capturing the render time of the largest image or text block visible within the viewport. * - Cumulative layout shift (CLS) - Measures visual stability by capturing the sum of all individual layout shift scores for every unexpected layout shift that occurs during the entire lifespan of the page. A layout shift occurs any time a visible element changes its position from one rendered frame to the next. Fewer shifts are better for page stability. - * - INP (interaction to next paint) - - Measures the time from when a user first interacts with a web page to the time when the browser responds to that interaction. + * - Interaction to next paint (INP) + - Measures responsiveness by observing all user interactions on a page and capturing the longest time it takes the browser to respond to an interaction. * - Total blocking time (TBT) - Measures the time it takes a page to become interactive and responsive for a user. - TBT is collected from a synthetic test, while INP is collected from real user data. They are considered equivalent to each other because they measure the same metric. + TBT is considered a lab proxy for INP, when INP might not be captured. Both TBT and INP can be improved by [optimizing interactions](https://web.dev/articles/optimize-inp#optimize_interactions). Prerequisites =================== @@ -60,4 +60,4 @@ See also * See :ref:`rum-synth-scenario` * See :new-page:`https://web.dev/vitals/` in the Google developer documentation to learn more about Web Vitals. -* See :ref:`error-aggregates` to learn more about Tag Spotlight. \ No newline at end of file +* See :ref:`error-aggregates` to learn more about Tag Spotlight.