Speed Test With Jitter - Portable

| Metric | Definition | Unit | Example | |--------|------------|------|---------| | | Time for a packet to travel to destination and back | ms | 20 ms | | Jitter | Standard deviation or mean absolute deviation of latencies across multiple packets | ms | 5 ms | | Packet Loss | Percentage of packets never acknowledged | % | 0.1% |

[ J(i) = J(i-1) + \fracD(i-1,i)16 ]

| Application | Max Tolerable Jitter | Typical Buffer | Consequence of Excess Jitter | |-------------|----------------------|----------------|-------------------------------| | VoIP (G.711) | 20 ms | 30–50 ms | Choppy audio, clipped words | | Video conferencing (Zoom) | 30 ms | 80 ms | Frozen frames, audio desync | | Online gaming (FPS) | 15 ms | None (real-time) | Rubber-banding, missed shots | | Web browsing | 200 ms | Large (HTTP cache) | Negligible | | 4K streaming | 50 ms | 2–5 seconds | No effect (buffered) | speed test with jitter

Jitter is defined as the statistical variance of packet inter-arrival times. If packets are sent at perfectly regular intervals (e.g., every 10 ms) but arrive at intervals of 8 ms, 12 ms, 9 ms, 11 ms, the variation is jitter. When jitter exceeds the buffer capacity of an application, packets are either discarded or delayed, causing perceptible degradation. | Metric | Definition | Unit | Example