What Is Bufferbloat?

Bufferbloat is high latency and packet queuing delay that occurs when a router's internal packet buffers become excessively full during active upload or download traffic. When family members stream 4K video or upload files, packets back up in the router's queue, causing ping to spike from 20 ms to 400 ms or more.

How WRLDU Evaluates Network Quality

Our Quality Assessment engine performs a multi-stage benchmark:

Unloaded Baseline Latency: Measures idle round-trip ping when no other traffic is moving across the pipe.
Download Loaded Latency: Probes latency while concurrently saturating your downstream bandwidth.
Upload Loaded Latency: Probes latency while aggressively pushing upstream chunks.
Bufferbloat Ratio: Compares loaded latency against the idle baseline to generate an objective quality score from A+ (zero queuing delay) to F (severe latency explosion).

How to Fix Bufferbloat

The definitive solution to bufferbloat is implementing modern active queue management (AQM) algorithms—such as CAKE or fq_codel—available in modern open-source router firmware like OpenWrt or commercial routers with Smart Queue Management (SQM) enabled.