---
title: "HTML Code Testing Waterfall Gap before the first request"
slug: "html-code-testing-waterfall-gap-before-the-first-request"
updated: 2023-01-06T15:49:41Z
published: 2023-01-06T15:49:41Z
canonical: "docs.catchpoint.com/html-code-testing-waterfall-gap-before-the-first-request"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.catchpoint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# HTML Code Testing Waterfall Gap before the first request

In HTML Code testing, there will be a gap at the beginning of the data download in the waterfall as shown in the below screenshot:

![inline-830171889.png](https://cdn.document360.io/cb4af8f9-6751-4fd2-b39c-07aae832badb/Images/Documentation/360000774651-inline-830171889.png)

## Explanation

This gap is the client time (browser HTML/CSS/javascript process time.) In other words, this is the browser time taken to process the HTML page before calling the first resource. It is the same as the gap that we can see in normal web tests after the base HTML has downloaded and the gap can be longer if there is JavaScript to execute.