c15t React – Throttled benchmark
@c15t/react@2.2.1
Hosted backend
This page shows c15t React under the throttled-mobile profile, which applies a 4× CPU slowdown, 1,638 kbps down, 750 kbps up and 150 ms of added latency to simulate slower conditions; it does not emulate a phone screen. Every load is cold, and each figure is the p75 of 20 loads in the run of 24 Sep 2026. c15t React scored 73/100 (Fair) and ranked 6th of the 12 tested installations. The banner appeared in 2.7 s (time to banner) and the page transferred 58.8 KB more than the no-SDK control (bytes over the wire). It delayed first paint by 451 ms (FCP) and added 1 ms of Total Blocking Time (TBT), and the banner covered 9.0 % of the first viewport (viewport coverage).
Score and composition
73Fair · ±0.5
throttled mobile · cold cache · p75 of 20 loads
CategoryWeightageScore
Banner Speed30 %46
Page Impact25 %92
Network Cost25 %74
Visitor Experience20 %87
Time to banner
2.7s
±81 ms across loads
First-paint delay
451ms
Beyond the control's 217 ms · TBT +1 ms
Transferred
58.8KB
Beyond the control's 135.9 KB · +6 requests
Viewport blocked
9.0%
Of the first viewport · clickable 66 ms later
20 loads · time to banner
2.6 smedian 2.7 s4.2 s
Where it sits in the field · 12 installations
60
80
0this provider · 73100
How the banner lands · p75 load
Document
668 msto first paint
Consent request
961 msvendor script
Script executes
1.3 sconsent layer
Banner visible
2.7 sfrom navigation start
LCP 668 ms · 451 ms later than the controlbanner 2.7 s · covers 9.0%
Across conditions · p75 per condition
| Condition | Score | Rank | Time to banner | Transferred | Viewport blocked | LCP |
|---|---|---|---|---|---|---|
| fast-desktop · cold | 83Good | 7 / 12 | 1.2s | 58.8KB | 9.0% | 83ms |
| throttled-mobile · cold | 73Fair | 6 / 12 | 2.7s | 58.8KB | 9.0% | 668ms |
Reported, not scored Does not affect the number
DeliveryHosted backend
Package@c15t/react@2.2.1
Framework of the test appNext.js 16.3.4
LanguageTypeScript / JavaScript
Bundle typeApp-bundled package
SDK licenceApache-2.0
Open source SDKYes (package license)
Deployed15 Sep 2026
Loads in this run20 per condition · 2 conditions