Tag: Performance Testing Basics

Speed Index

Speed Index (SI) is a UI Performance Testing metric that calculates how quickly the content of the webpage is visually displayed to the end-users. Actually, the speed index is not a time-based unit. It is a score that represents the content loading speed of a web page. The lesser is the value of SI, the…
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Largest Contentful Paint

Largest Contentful Paint or LCP is one of the important metrics in UI Performance Testing. It provides the time when the largest element of the web page is loaded in the browser and ready to consume by the user. Also note that the LCP only counts the loading time of what is relevant to the user…
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First Contentful Paint

First Contentful Paint or FCP is one of the important metrics in UI Performance Testing. It provides the time when the browser renders the first bit of content like text, image, non-white canvas etc. It gives the first impression to the user that the page is actually loading. Behind the concept of FCP, there is another…
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First Paint – UI Metric

First Paint is a UI Metric denotes the time when the browser renders the very first pixels to the screen. In simple words, it refers to the time at which the first pixel renders on a screen after a user navigates to a web page. The browser can render anything that is visually different from what…
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Performance Testing – Important Acronyms/Extensions

List of some frequently used and important acronyms and extensions in the Performance Testing world. Important Acronyms in Performance Testing: Acronyms Full-Form API  Application Programming Interface AUT  Application Under Test CLI  Command Line Interface CR  Change Request DFD  Data Flow Diagram DNS  Domain Name Server EPT Early Performance Testing GUI  Graphical User Interface HLD  High-Level…
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How to make a Performance Test more realistic?

Performance Testing of any application or system has two primary objectives: To find out the capacity of the system at the desired load To find out the performance bottleneck which restricts the system to achieve the expected load. On the basis of these two main goals, performance testing tools are designed. One point to be…
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