Throughput
Measures peak download and upload rates. Useful for large files, streaming capacity, and plan verification.
speed-test comparison
Bufferbloat speed test
A normal speed test tells you how much data your connection can move. A bufferbloat test asks a different question: does latency / ping stay stable while the connection is busy?
speed is only half the story
Run the test ordinary speed tests miss.
Measure quiet ping, ping under download load, ping under upload load, and throughput in one browser-based report.
Why speed alone is incomplete
Download and upload speed are throughput measurements. They are useful, but they do not fully explain internet reliability. A connection can report hundreds of megabits per second while video calls freeze, games feel delayed, and websites hesitate whenever other traffic is active.
That gap is often latency under load. The connection still has capacity, but packets spend too long waiting in queues before they are transmitted.
Idle latency
Measures response time while the connection is quiet. Useful, but incomplete when the real problem appears only under load.
Loaded latency
Measures whether latency / ping rises during download and upload pressure. This is the practical signal for bufferbloat.
What Bufferbloat.org reports
Bufferbloat.org records quiet latency, download-loaded latency, upload-loaded latency, download throughput, upload throughput, and a bufferbloat grade. The result separates the raw measurement from the interpretation so the method can be inspected.
The test runs in the browser, normally takes less than a minute, and exposes a technical-details table that can be exported as CSV.
When to use it
Run a bufferbloat test when the connection looks fast on paper but feels unreliable during calls, games, uploads, cloud backups, or shared household use.