Core Web VitalsLCP, CLS and TBT come from the page load. INP comes from the Accept click. Google rates LCP good up to 2.5 s and poor above 4 s. It rates INP good up to 200 ms and poor above 500 ms. It rates CLS good up to 0.1 and poor above 0.25. It does not rate TBT.
LCPLargest Contentful Paint
Needs improvement: 3.06 s+184 ms vs no CMP
Needs improvement: 3.31 s+432 ms vs no CMP
Needs improvement: 3.30 s+432 ms vs no CMP
Needs improvement: 3.37 s+492 ms vs no CMP
Needs improvement: 3.49 s+612 ms vs no CMP
Needs improvement: 3.65 s+772 ms vs no CMP
Needs improvement: 3.69 s+812 ms vs no CMP
Needs improvement: 3.74 s+856 ms vs no CMP
Poor: 4.16 s+1.28 s vs no CMP
Poor: 4.77 s+1.90 s vs no CMP
INPInteraction to Next Paint, for the Accept click
Good: 24 ms
Good: 32 ms
Good: 120 ms
Good: 24 ms
Good: 32 ms
Good: 48 ms
Good: 16 ms
Good: 16 ms
Good: 16 ms
Good: 32 ms
CLSCumulative Layout Shift
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
Good: 0.00
TBTTotal Blocking Time during load
0 ms
3 ms+3 ms vs no CMP
147 ms+147 ms vs no CMP
163 ms+163 ms vs no CMP
51 ms+51 ms vs no CMP
200 ms+200 ms vs no CMP
114 ms+114 ms vs no CMP
83 ms+83 ms vs no CMP
290 ms+290 ms vs no CMP
976 ms+976 ms vs no CMP
Page loadGoogle rates TTFB good up to 0.8 s and FCP good up to 1.8 s. Content paint is the paint time of the article image. We time it even when the banner was the largest element.
TTFBTime to First Byte
Good: 5 ms
Good: 2 ms
Good: 2 ms
Good: 2 ms
Good: 2 ms
Good: 2 ms−0 ms vs no CMP
Good: 2 ms
Good: 2 ms
Good: 2 ms
Good: 2 ms+0 ms vs no CMP
FCPFirst Contentful Paint
Good: 244 ms+12 ms vs no CMP
Good: 228 ms
Good: 244 ms
Good: 240 ms
Good: 236 ms
Good: 244 ms+8 ms vs no CMP
Good: 236 ms
Good: 244 ms
Good: 236 ms
Good: 244 ms+8 ms vs no CMP
Content paintThe article image painted
3.06 s+184 ms vs no CMP
3.31 s+432 ms vs no CMP
3.30 s+432 ms vs no CMP
3.37 s+492 ms vs no CMP
3.49 s+612 ms vs no CMP
3.65 s+772 ms vs no CMP
3.97 s+1.09 s vs no CMP
3.74 s+856 ms vs no CMP
4.16 s+1.28 s vs no CMP
4.77 s+1.90 s vs no CMP
LCP elementWhat the browser picked as the largest element
BannerMilliseconds from navigation. p75 is where the slowest quarter of visits starts.
CMP requestedFirst request for the CMP’s script or config
CMP loadedThe download of the CMP’s main script is complete
Consent knownThe CMP reports the visitor’s consent state
1.52 s
Banner visibleThe banner is on screen
1.08 s
1.55 s
1.76 s
1.94 s
2.24 s
2.32 s
3.68 s
3.71 s
3.74 s
7.52 s
Screen coveredShare of the viewport the banner covers
Click responseTime until the screen updates. We rate it like INP: good up to 200 ms, poor above 500 ms. The browser reports these times in 8 ms steps. It does not report clicks under 16 ms.
AcceptAccept all, from the banner
Good: 24 ms
Good: 32 ms
Good: 120 ms
Good: 24 ms
Good: 32 ms
Good: 48 ms
Good: 16 ms
Good: 16 ms
Good: 16 ms
Good: 32 ms
RejectReject all, from the banner
Good: 16 ms
Good: 24 ms
Good: 80 ms
Good: 16 ms
Good: 40 ms
Good: 48 ms
Good: 24 ms
Good: 16 ms
Good: 16 ms
Good: 32 ms
SaveSave, in the preferences dialog
Good: 32 ms
Good: 88 ms
Good: 48 ms
Good: 40 ms
Good: 24 ms
Good: 16 ms
Good: 104 ms
Good: 32 ms
Next clickA click on the page 500 ms after Accept
Good: 16 ms
Good: 16 ms
Good: 16 ms
Good: 16 ms
Good: 16 ms
Good: 24 ms
Good: 16 ms
Good: 16 ms
Good: 16 ms
After AcceptMilliseconds from the click. Main thread is the long-task blocking time after it.
Banner goneBanner and any overlay removed
Consent appliedThe CMP’s consent state matches the choice
Scripts ranEvery script that the choice lets run is complete
Main threadLong-task blocking time after the click
After RejectReject lets no scripts run, so there is no script time to report.
Banner goneBanner and any overlay removed
Consent appliedThe CMP’s consent state matches the choice
Main threadLong-task blocking time after the click
After SaveFrom the Save click in the preferences dialog.
Banner goneBanner and any overlay removed
Consent appliedThe CMP’s consent state matches the choice
Scripts ranEvery script that the choice lets run is complete
Main threadLong-task blocking time after the click
Download sizeThe first load. Unpacked is the size after decompression. That is the code that the browser must parse.
TransferredBytes over the network during the first load
530 KB+31 KB vs no CMP
583 KB+84 KB vs no CMP
584 KB+85 KB vs no CMP
598 KB+98 KB vs no CMP
621 KB+121 KB vs no CMP
652 KB+153 KB vs no CMP
711 KB+211 KB vs no CMP
663 KB+164 KB vs no CMP
752 KB+253 KB vs no CMP
1.03 MB+532 KB vs no CMP
UnpackedThe same bytes after decompression
624 KB+97 KB vs no CMP
886 KB+359 KB vs no CMP
874 KB+348 KB vs no CMP
873 KB+346 KB vs no CMP
985 KB+458 KB vs no CMP
1.12 MB+592 KB vs no CMP
1.38 MB+855 KB vs no CMP
1.24 MB+711 KB vs no CMP
1.53 MB+1.00 MB vs no CMP
7.73 MB+7.20 MB vs no CMP
DeferredBytes transferred after the first load settled
RequestsRequests during the first load
15+9 vs no CMP
9+3 vs no CMP
10+4 vs no CMP
8+2 vs no CMP
10+4 vs no CMP
8+2 vs no CMP
18+12 vs no CMP
23+17 vs no CMP
12+6 vs no CMP
15+9 vs no CMP
Third-partyRequests to other hosts during the first load
9
1
4
2
4
2
12
17
6
9
Returning visitorsA visitor who accepted earlier loads the page again. We expect the banner to stay hidden.
Banner hiddenThe banner stayed hidden on the return visit
Consent knownTime from navigation until the CMP restores the stored choice
Consent checksNo tracker or cookie before the visitor chooses, and the choice holds afterwards. A check we could not run is not a failure.
ChecksLoad, Accept, Reject, Save, withdrawal and keyboard checks
3 of 4 passed1 could not run
4 of 4 passed
2 of 4 passed2 failed
3 of 4 passed1 could not run
4 of 4 passed
4 of 4 passed
4 of 4 passed
4 of 4 passed
4 of 4 passed
4 of 4 passed
A value without a “vs no CMP” line had no measurable change from the same page without a consent manager.
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