Bufferbloat Test
See how your network behaves under load
Test Results
bufferbloat.libreqos.com
Advanced details
Detailed Statistics
| Phase | Duration | Samples | Median | Mean | Min | Max | Increase | Std Dev | Jitter | 5th %ile | 90th %ile |
|---|
What Each Phase Tests
Baseline
Your connection's inherent latency when idle (measures base network quality)
Download
How much latency increases when downloading large files (simulates streaming, software updates)
Upload
How much latency increases when uploading data (simulates video calls, cloud backups)
Bidirectional
How much latency increases during simultaneous heavy download and upload (simulates real-world mixed usage)
Cooldown
How quickly latency recovers after stopping all traffic (shows network recovery speed)
Grade Meanings
Excellent
Your connection has virtually no bufferbloat! Perfect for video calls, online gaming, and real-time applications. Your connection maintains low latency even under heavy load.
Very Good
Minimal bufferbloat with excellent performance. Great for video calls, streaming, and gaming. You may notice slight delays only during very heavy usage.
Good
Moderate bufferbloat that's generally acceptable. Good for most activities, though you might notice some lag during video calls or gaming when downloading large files.
Fair
Noticeable bufferbloat that affects performance. You'll likely experience lag during video calls, choppy streaming, and delayed responses in online games when your connection is busy.
Poor
Significant bufferbloat causing major performance issues. Video calls will be problematic, streaming may buffer frequently, and online gaming will be frustrating during heavy usage.
Very Poor
Severe bufferbloat making real-time applications nearly unusable. Video calls will drop frequently, streaming will buffer constantly, and online gaming will be extremely laggy when downloading or uploading.
What is LibreQoS?
LibreQoS is an open-source toolkit that helps ISPs deliver low-latency, fair connections by managing queueing and bufferbloat at the edge. We offer this test so anyone can see how their connection behaves under load—and how smart QoS can keep calls, games, and streaming smooth. Learn more at libreqos.io.
What Can I Do About Bufferbloat?
🔧 Router Solutions
Consider routers with built-in bufferbloat mitigation like Eero, Firewalla, MikroTik, or Alta Labs.
📞 Contact Your ISP
Share your test results with your Internet Service Provider. They may be able to adjust settings or upgrade equipment to reduce bufferbloat.