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: 3.47 s+108 ms vs no CMP
Needs improvement: 3.84 s+476 ms vs no CMP
Needs improvement: 3.74 s+384 ms vs no CMP
Needs improvement: 3.65 s+292 ms vs no CMP
Needs improvement: 3.77 s+404 ms vs no CMP
Needs improvement: 3.92 s+568 ms vs no CMP
Poor: 4.10 s+736 ms vs no CMP
Poor: 4.46 s+1.10 s vs no CMP
Needs improvement: 3.67 s+300 ms vs no CMP
Poor: 4.98 s+1.62 s vs no CMP
INPInteraction to Next Paint, for the Accept click
Good: 16 ms
Good: 40 ms
Good: 120 ms
Good: 24 ms
Good: 16 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
25 ms+25 ms vs no CMP
145 ms+145 ms vs no CMP
192 ms+192 ms vs no CMP
50 ms+50 ms vs no CMP
202 ms+202 ms vs no CMP
83 ms+83 ms vs no CMP
301 ms+301 ms vs no CMP
116 ms+116 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: 4 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: 776 ms+44 ms vs no CMP
Good: 1.16 s+436 ms vs no CMP
Good: 908 ms+184 ms vs no CMP
Good: 928 ms+204 ms vs no CMP
Good: 764 ms+32 ms vs no CMP
Good: 888 ms+156 ms vs no CMP
Good: 832 ms+100 ms vs no CMP
Good: 920 ms+192 ms vs no CMP
Good: 800 ms+72 ms vs no CMP
Good: 756 ms+28 ms vs no CMP
Content paintThe article image painted
3.47 s+108 ms vs no CMP
3.84 s+476 ms vs no CMP
3.74 s+384 ms vs no CMP
3.65 s+292 ms vs no CMP
3.77 s+404 ms vs no CMP
3.92 s+568 ms vs no CMP
4.10 s+736 ms vs no CMP
4.46 s+1.10 s vs no CMP
4.44 s+1.07 s vs no CMP
4.98 s+1.62 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
1.42 s
Banner visibleThe banner is on screen
1.04 s
1.46 s
1.75 s
1.75 s
2.04 s
2.06 s
3.56 s
3.57 s
3.66 s
7.54 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: 16 ms
Good: 40 ms
Good: 120 ms
Good: 24 ms
Good: 16 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: 32 ms
Good: 88 ms
Good: 24 ms
Good: 24 ms
Good: 48 ms
Good: 16 ms
Good: 16 ms
Good: 16 ms
Good: 32 ms
SaveSave, in the preferences dialog
Good: 32 ms
Good: 88 ms
Good: 40 ms
Good: 40 ms
Good: 16 ms
Good: 104 ms
Good: 48 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: 16 ms
Good: 16 ms
Good: 24 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
583 KB+31 KB vs no CMP
652 KB+100 KB vs no CMP
639 KB+87 KB vs no CMP
650 KB+98 KB vs no CMP
673 KB+121 KB vs no CMP
705 KB+153 KB vs no CMP
716 KB+164 KB vs no CMP
805 KB+253 KB vs no CMP
763 KB+211 KB vs no CMP
1.08 MB+532 KB vs no CMP
UnpackedThe same bytes after decompression
815 KB+97 KB vs no CMP
1.11 MB+394 KB vs no CMP
1.07 MB+348 KB vs no CMP
1.06 MB+346 KB vs no CMP
1.18 MB+458 KB vs no CMP
1.31 MB+592 KB vs no CMP
1.43 MB+711 KB vs no CMP
1.72 MB+1.00 MB vs no CMP
1.57 MB+855 KB vs no CMP
7.92 MB+7.20 MB vs no CMP
DeferredBytes transferred after the first load settled
RequestsRequests during the first load
16+9 vs no CMP
17+10 vs no CMP
11+4 vs no CMP
9+2 vs no CMP
11+4 vs no CMP
9+2 vs no CMP
24+17 vs no CMP
13+6 vs no CMP
19+12 vs no CMP
16+9 vs no CMP
Third-partyRequests to other hosts during the first load
9
1
4
2
4
2
17
6
12
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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