Deep dive into network latency on the web: an interactive report based on Round-Trip Time (RTT) data from Chrome UX Report (CrUX).
This is an interactive report to explore network latency on the web. It addresses questions such as: What is the current health of the network? How does it vary by domain ending and website categories? It uses Round-Trip Time (RTT) data from Chrome UX Report (CrUX).
RTT shows the time it takes for a request to go from a client to the server and back (round-trip). In CrUX, it is estimated on the initial page load navigation using navigator.connection.rtt and measured in milliseconds. CrUX provides 75th percentile (p75) aggregated for all domain visits during the past 28 days.
RTT is a diagnostic metric that helps you to understand your audience network connection. Instead of relying on 2G, 3G, or 4G labels (which are also based on RTT), it provides better visibility to your visitors' connection. For example, if your site's average RTT is slow, performance metrics like TTFB or LCP are also likely to be impacted. Consider loading some parts of your site conditionally (learn more). But if RTT is fast and you still have slow metrics, you need to optimize your site. To measure your site's performance, use our free Site Speed Test.
Methodology: we took RTT data for the top 50,000 origins of CrUX's August 2026 list, collected on October 1, 2026 (excluding empty values, which resulted in 49,327). Here are the median (p50) values by device type:
On the average origin of the list, 74% of the traffic comes from phones, and the median on all devices (133 ms) lies closer to Mobile's (147 ms) than to Desktop's (92 ms). The table below provides a detailed breakdown of the RTT distribution with percentiles and statistics:
| Device | p10 | p25 | p50 | p75 | p90 | Distribution | min | avg | max | total |
|---|---|---|---|---|---|---|---|---|---|---|
| Desktop | 61ms | 72ms | 92ms | 122ms | 167ms | 9ms | 105ms | 1026ms | 39,938 | |
| All devices | 83ms | 100ms | 133ms | 186ms | 252ms | 9ms | 153ms | 2715ms | 49,327 | |
| Mobile | 95ms | 113ms | 147ms | 201ms | 263ms | 51ms | 166ms | 2718ms | 48,164 |
Let's explore RTT by domain ending. On all devices the median runs from 63 ms (.nl) to 353 ms (.ng) over 70 country endings, 112 ms in the middle. Distance shows in Australia and New Zealand: .au (132 ms, 46th) and .nz (170 ms, 58th) stand above the middle, and on desktop, where the mobile network plays no part, they stay slower (108 ms and 141 ms) than .jp (60 ms) and .tw (50 ms). We computed regional RTT using top-level domains (TLDs). For example, .nl represents the Netherlands, and .ca is Canada.
The map below displays the median RTT (p50). And the table lists the top 10 fastest and slowest domain endings. You can interact with the map and use the device switch to change aggregation.
Rank | Domain ending | p50 |
|---|---|---|
| 1. | Netherlands (.nl) | 63ms |
| 2. | Sweden (.se) | 73ms |
| 3. | Norway (.no) | 74ms |
| 4. | Denmark (.dk) | 75ms |
| 5. | Belgium (.be) | 78ms |
| 6. | United Kingdom (.uk) | 79ms |
| 7. | Switzerland (.ch) | 79ms |
| 8. | Czechia (.cz) | 81ms |
| 9. | Taiwan (.tw) | 82ms |
| 10. | Germany (.de) | 84ms |
| … | … | … |
| 61. | Kazakhstan (.kz) | 183ms |
| 62. | Uzbekistan (.uz) | 194ms |
| 63. | Saudi Arabia (.sa) | 206ms |
| 64. | Egypt (.eg) | 207ms |
| 65. | South Africa (.za) | 225ms |
| 66. | Sri Lanka (.lk) | 239ms |
| 67. | Iran (.ir) | 254ms |
| 68. | Pakistan (.pk) | 276ms |
| 69. | Kenya (.ke) | 299ms |
| 70. | Nigeria (.ng) | 353ms |
By website category, the median RTT on all devices runs from 110 ms (Shopping) to 157 ms (Adult Content): the slowest stands 43% above the fastest. To classify websites, we used Chrome's topic classifier (chrome://topics-internals/). Below is an interactive table to explore the network latency across different clusters of the web:
| Category | p10 | p25 | p50 | p75 | p90 | Distribution | min | avg | max | total |
|---|---|---|---|---|---|---|---|---|---|---|
| Shopping | 79ms | 92ms | 110ms | 141ms | 195ms | 30ms | 125ms | 598ms | 4,384 | |
| Autos & Vehicles | 81ms | 94ms | 112ms | 150ms | 197ms | 39ms | 130ms | 598ms | 1,252 | |
| Travel & Transportation | 84ms | 98ms | 116ms | 149ms | 196ms | 39ms | 132ms | 955ms | 1,523 | |
| Business & Industrial | 78ms | 95ms | 120ms | 166ms | 230ms | 33ms | 141ms | 1016ms | 3,091 | |
| Sports | 83ms | 98ms | 119ms | 161ms | 236ms | 52ms | 142ms | 1316ms | 1,962 | |
| News | 83ms | 99ms | 124ms | 168ms | 234ms | 9ms | 144ms | 1579ms | 6,758 | |
| Finance | 78ms | 95ms | 129ms | 178ms | 235ms | 38ms | 145ms | 849ms | 2,556 | |
| Law & Government | 79ms | 98ms | 132ms | 178ms | 228ms | 36ms | 146ms | 892ms | 2,845 | |
| Books & Literature | 87ms | 101ms | 138ms | 183ms | 232ms | 45ms | 150ms | 600ms | 1,258 | |
| Computers & Electronics | 79ms | 99ms | 133ms | 185ms | 246ms | 39ms | 150ms | 1002ms | 2,916 | |
| Games | 81ms | 98ms | 132ms | 182ms | 252ms | 35ms | 151ms | 1117ms | 3,134 | |
| All ☼ | 83ms | 100ms | 133ms | 186ms | 252ms | 9ms | 153ms | 2715ms | 49,327 | |
| Internet & Telecom | 82ms | 103ms | 139ms | 191ms | 246ms | 35ms | 156ms | 2715ms | 3,198 | |
| Jobs & Education | 78ms | 100ms | 140ms | 193ms | 254ms | 30ms | 156ms | 862ms | 4,192 | |
| Online Communities | 83ms | 105ms | 147ms | 201ms | 267ms | 39ms | 163ms | 1117ms | 2,767 | |
| Arts & Entertainment | 88ms | 108ms | 147ms | 207ms | 271ms | 30ms | 166ms | 1579ms | 10,263 | |
| Adult Content | 90ms | 114ms | 157ms | 221ms | 283ms | 30ms | 177ms | 1132ms | 6,133 |
Next: This is the first iteration of the report. We plan to expand its functionality once more RTT data is available in CrUX. Feel free to contact us via Email or Twitter and suggest your ideas and improvements.