Skip to main contentHow fast does the banner appear?
2.38 s
Median of 15 visits.
All 6 integrations, best first
- React1.75 s
- Script tag1.94 s
- Astro1.94 s
- Nuxt2.17 s
- TanStack Start2.38 s
- Next.js2.47 s
Cookie ControlCivicCookie Control cookie banner: speed and features
In our tests with its TanStack Start integration, Cookie Control showed its cookie banner in a median 2.38 s on an emulated mid-tier phone. It delayed the main content by 496 ms (95% interval 488 ms to 524 ms). Accept responded in 24 ms and Reject in 24 ms. It held trackers back in 3 of 4 consent checks. We could not confirm the other check.
On desktop, the banner took 380 ms. Per vendor docs, Cookie Control supports IAB TCF, Google Consent Mode v2, Google CMP certification and Global Privacy Control. We could not confirm IAB GPP.
How fast is Cookie Control’s cookie banner?
On TanStack Start. We measured other CMPs on Next.js only, so this comparison uses Cookie Control’s other integrations.
Does it slow the page down?
+496 ms95% interval 488 ms to 524 ms
Compared with the same page without a consent manager.
All 6 integrations, best first
- React292 ms
- Next.js492 ms
- Nuxt492 ms
- Script tag492 ms
- Astro496 ms
- TanStack Start496 ms
How fast does a click respond?
24 msOne visit measured
Reject responded in 24 ms. Under 200 ms feels instant.
All 6 integrations, best first
- Next.js24 ms
- Nuxt24 ms
- Astro24 ms
- TanStack Start24 ms
- React24 ms
- Script tag24 ms
Does it block trackers until consent?
3 of 4consent checks passed
We could not confirm 1 of 4 checks either way.
All 6 integrations, best first
- Next.js75%
- Nuxt75%
- Astro75%
- TanStack Start75%
- React75%
- Script tag75%
Which standards and features does Cookie Control support?
Each status comes from Civic’s documentation for Cookie Control. CookieBench does not test these features unless a line says so.
- Verified by test
- Per vendor docs
- Partial
- Not supported
- Unknown
| Feature | Status |
|---|---|
| IAB TCF | TCF v2.3 (vendor documentation, opens in a new tab) |
| IAB GPP | Unknown |
| Google Consent Mode v2 | Per vendor docs (vendor documentation, opens in a new tab) |
| Google-certified CMP | Per vendor docs (vendor documentation, opens in a new tab) |
| Global Privacy Control | Per vendor docs (vendor documentation, opens in a new tab) |
| Feature | Status |
|---|---|
| Geo-targeted banners | Paid editions (vendor documentation, opens in a new tab) |
| Script blocking | Per vendor docs (vendor documentation, opens in a new tab) |
| Consent records | Per vendor docs (vendor documentation, opens in a new tab) |
| Cookie scanning | Paid editions (vendor documentation, opens in a new tab) |
| Feature | Status |
|---|---|
| Open source | Proprietary (vendor documentation, opens in a new tab) |
| Self-hostable | Hosted service (vendor documentation, opens in a new tab) |
| Headless UI | JavaScript methods only (vendor documentation, opens in a new tab) |
| TypeScript types | Unknown |
| Feature | Status |
|---|---|
| Free tier | Community edition (vendor documentation, opens in a new tab) |
Which frameworks does Cookie Control support?
- First-party SDKs
- None
- Script tag
- Supported
- Measured in this run
- Script tag, React, Next.js, Nuxt, Astro and TanStack Start
Support per Civic’s documentation (opens in a new tab).
Cookie Control’s results by framework, mobile (emulated)
Each row is a separate app. We measured each one against the same app without a consent manager. The rows compare integrations, not frameworks.
| Framework | Banner appears | Page slowed by | Click responds in | Trackers blocked |
|---|---|---|---|---|
| Script tag | 1.94 s | +492 ms95% interval 488 ms to 508 ms | 24 msOne visit measured | 3 of 4 passed |
| React | 1.75 s | +292 ms95% interval 268 ms to 300 ms | 24 msOne visit measured | 3 of 4 passed |
| Next.jsShared with every CMP | 2.47 s | +492 ms95% interval 484 ms to 504 ms | 24 msOne visit measured | 3 of 4 passed |
| Nuxt | 2.17 s | +492 ms95% interval 480 ms to 508 ms | 24 msOne visit measured | 3 of 4 passed |
| Astro | 1.94 s | +496 ms95% interval 488 ms to 504 ms | 24 msOne visit measured | 3 of 4 passed |
| TanStack StartShown above | 2.38 s | +496 ms95% interval 488 ms to 524 ms | 24 msOne visit measured | 3 of 4 passed |
Were there problems testing Cookie Control?
We show each missing answer as missing, never as zero.
Desktop
- There is no granular save-preferences flow to test.
Mobile (emulated)
- There is no granular save-preferences flow to test.
When does Cookie Control load, and what does it cost the page?
Lab detail for engineers. All Core Web Vitals are here. The summary leaves some of them out.
When does Cookie Control start loading?
The banner was visible at 2.38 s. The published results do not show when Cookie Control started to load.
| Event | Time from navigation |
|---|---|
| First byte (TTFB) | 8 ms |
| First paint (FCP) | 252 ms |
| Banner visible | 2.38 s |
| Largest paint (LCP) | 3.82 s |
| CMP requested | |
| CMP loaded | |
| Consent state known |
How do page vitals compare with no consent manager?
Each row shows the value on the page with the consent manager. It also shows how far the value moved from the same page without one.
| Measure | With Cookie Control | Difference |
|---|---|---|
| TTFBTime to first byte | 8 ms | No measurable difference95% interval −4 ms to 2 ms |
| FCPFirst Contentful Paint | 252 ms | No measurable difference95% interval 0 ms to 16 ms |
| LCPLargest Contentful Paint | 3.82 s | +496 ms95% interval 488 ms to 524 ms |
| CLSCumulative Layout Shift | 0.00 | No measurable difference95% interval: 0.00 |
| Primary content paintThe page’s main content, not the banner | 3.82 s | +496 ms95% interval 488 ms to 524 ms |
What was the largest element on screen?
LCP times the largest element on screen. If that is the banner, LCP measures the banner instead of the page.
There is no LCP attribution for this profile and framework.
What happens after a visitor clicks Accept?
The screen responded to Accept in 24 ms.
| Event | Time from the click |
|---|---|
| Screen responds | 24 ms |
| Banner gone | |
| Consent applied | |
| Analytics active |
How much does it download?
Initial transfer happens before the page settles. Deferred transfer comes after.
| Measure | With Cookie Control | Difference |
|---|---|---|
| Initial transferBytes before the page settles | 688 KB | +99 KB95% interval: 99 KB |
| Deferred transferBytes loaded later | Not compared | |
| RequestsAll requests | 9 | +2No interval reported |
| Third-party requestsRequests to other hosts | 2 | +2No interval reported |
Does it block the main thread?
Long tasks are stretches over 50 ms when the page cannot respond to taps or keys.
| Measure | With Cookie Control | Difference |
|---|---|---|
| Long-task timeBlocking time during load | 214 ms | +190 msNo interval reported |
What do returning visitors see?
A visitor who accepted on an earlier visit comes back. We check that the banner stays hidden.
- Banner stayed hidden
- Consent state known at
What was tested?
- Methodology
- cookiebench-v3.2.4
- Analysis
matrix-2026-10-11
On desktop, it appeared in a median 385 ms, against 471 ms for the median of the 10 CMPs measured. On an emulated mid-tier phone, it appeared in a median 2.47 s, against 2.71 s for the median of the 10 CMPs measured.
On desktop it added no measurable delay to the main content. On an emulated mid-tier phone it delayed the main content by 492 ms (95% interval 484 ms to 504 ms). Delay is the extra time before the main content appears. We compare Largest Contentful Paint on the same page, with and without a consent manager.
It passed 3 of 4 checks on desktop and on an emulated mid-tier phone. We could not confirm the other check. A check fails if a tracker runs, the page sets a cookie or data leaves the page before the visitor chooses.
Per vendor docs, Cookie Control supports IAB TCF, Google Consent Mode v2, Google CMP certification and Global Privacy Control. We could not confirm IAB GPP. Feature support comes from Cookie Control’s documentation. CookieBench did not test these features itself.
