Latencyis the delay from input into a system to desired outcome;

The term is understood slightly differentlyin various contexts and latency issues also vary from one system to another.

Typeof latency:

Network latency

Internet latency

Interrupt latency

WAN Latency

Audio Latency,is the delay between sound being crated and heard.

Database server latency: also known as response time or access time, is a measure of how longit takes for the database to respond to a single request.

Browser latency:

1). Keydown latency:tests the delay from keypress to on-screen response.

2).Scroll latency:tests the delay from mousewheel movement to on-screen response.

3).Native reference: tests the input latency of a native app’s window for comparison tothe browser.

4).Baseline Jank:tests the responsiveness while the browser is idle.

Jankrefers to the short interruptions in the middle of an animation or interaction.

5).JavaScript Jank:tests the responsiveness during JavaScript execution.

6).Image Loading

Jank:tests the responsiveness during imageloading.

Howto reduce latency:

1). Techniques: Data prefetching, multithreading, parallelizing across multipleexecution threads.

2). Methods: uninstall unnecessary programs, optimizing networking and softwareconfigurations, upgrading or overclocking hardwares.