Front-end performance analysis with Sitespeed.io.
The table below lists pre-made profiles from Sitespeed Throttle. Bandwidth values are in kbit/s (upload and download) and RTT is in ms.
| Profile | Upload (kbit/s) | Download (kbit/s) | RTT (ms) | Approx. Download (Mbps) |
|---|---|---|---|---|
| 4g | 9000 | 9000 | 85 | ~9.00 Mbps |
| 3g | 768 | 1600 | 150 | ~1.60 Mbps |
| 3gfast | 768 | 1600 | 75 | ~1.60 Mbps |
| 3gslow | 400 | 400 | 200 | ~0.40 Mbps |
| 3gem | 400 | 400 | 200 | ~0.40 Mbps |
| 2g | 256 | 280 | 400 | ~0.28 Mbps |
| cable | 1000 | 5000 | 14 | ~5.00 Mbps |
| lte | 12000 | 12000 | 35 | ~12.00 Mbps |
Source: Sitespeed Throttle documentation
Tip: If you need to override these defaults, create a custom profile with --connectivity.down, --connectivity.up, and --connectivity.rtt, or configure the throttle service manually.
National 4G indicators:
| Metric | Value |
|---|---|
| Average 4G download speed | 12.16 Mbps |
| Average 4G upload speed | 2.96 Mbps |
| Average latency | 54.10 ms |
| 4G coverage time | 92.65% |
| Packet loss | 0.79% |
Average 4G download speed by operator (national):
| Operator | Avg download (Mbps) |
|---|---|
| Claro | 12.65 |
| Bitel | 12.50 |
| Entel | 11.90 |
| Movistar | 11.09 |
Source: OSIPTEL press release, 29 Aug 2025
Source: Panel de Monitoreo de Internet Móvil, consolidated report for July 2025 (page 15). PDF
Requirements:
- Docker Desktop (or Docker Engine) installed and running.
- Install the dependencies (one-time setup):
npm install
- Add URLs to
urls.txt(one per line). You can optionally add an alias after the URL:https://acme.com home_prod http://qa.google.com/ qa_google
- Run tests with one of the project scripts:
npm run perf:4g npm run perf:3g
- Review the HTML report output under
./sitespeed-result/(a timestamped folder is created per run).
Important: The throttle connectivity engine tweaks your system network rules to emulate slow links and those changes persist until you remove them. After you finish your tests, run sudo throttle --stop to restore your normal bandwidth (otherwise all your apps will keep using the throttled profile). You can check whether throttling is still active with sudo throttle --status.