LiteSpeed Knowledgebase

From a distance, LiteSpeed is a web server like Apache or ngnix. Up close, LiteSpeed is a very special web server. LiteSpeed originates from the US company LiteSpeed Inc. of the same name and was launched in 2001. The LiteSpeed web server is therefore not a new release. However, the degree of...

Are you one of the thousands of users who have always believed that Google PageSpeed Insights is about load time? There may be many reasons for this very common misconception, but you too have probably been misled by the word speed in the name PageSpeed? Especially since what else should it be...

For those who don't know what a cache actually is, let's deal with it first. This basic knowledge is essential for understanding LScache.Basically, the term cache is already ancient and has been around almost since the first day of computers and software. In order to understand what a cache...

With reference to "Why doesn't PageSpeed measure the Loading Time?" n this article we want to deal with the question of what is the difference between the loading time and the display time. However, you will first ask yourself what is the loading time and what is the display time and whether they...

Edge Side Includes (ESI) is a technology used in web page development to improve web application performance and scalability. ESI makes it possible to generate dynamic content on a website by breaking it up into small, self-contained modules. These modules can then be cached and managed...

LiteSpeed LScache is the cache engine of the LiteSpeed web server. Like almost every other HTTP cache, LScache is URL based. This means that one (1) static cache copy is created from each URL. This also includes URLs with $_GET parameters, by the way, at least for LiteSpeed. Apparently that would...

Performance: Nginx and LiteSpeed web servers tend to be faster than Apache, especially when processing static files. The LiteSpeed web server is particularly well known for its excellent performance and scalability.Memory footprint: Compared to Apache, Nginx and LiteSpeed web servers...

lsphp is a PHP handler provided by the LiteSpeed Web Server software. It is an alternative to the standard PHP handlers like mod_php and PHP-FPM used by other web servers like Apache and Nginx.Lsphp offers high performance and scalability for PHP-based web applications and is particularly...

The Cache Mode feature is an undocumented LiteSpeed feature that not only speeds up crawling. It also allows to refresh the cache of a URL if the cache is not expired. If the cache is not expired the cache is refreshed by the set TTL. If the cache is expired it is normally warmed up. The cache...

Compared to Nginx, the LiteSpeed web server offers a few advantages:Better Performance: The LiteSpeed web server is generally faster than Nginx, especially when processing PHP. This is because it has an improved architecture and optimized code. Compatibility with Apache: The...

For each cached URL, LiteSpeed LScache creates a static copy of the output of the URL in the /lscache directory, which is outside the public_html directory. The compression feature can be used todetermine whether the cache that has been preheated by Kitt should be compressed as...

ESI:inline and ESI:include are two different directives in ESI, each used to embed dynamic content in a web application.ESI:include : This directive makes it possible to fetch dynamic content from another resource or server and embed it in the current page. The server loads the content...

With the Crawler Mode Feature you can specify whether the cache should be purged before the crawl starts. Except for Wordpress or when using the LiteSpeed LScache plugin for Wordpress,the entire cache created by the respective cache plugin is always purged. The LiteSpeed LScache Plugin...

HTTP/3 is a further development of the HTTP/2 protocol and has several advantages: Faster connection establishment: HTTP/3 uses the QUIC protocol as a transport protocol, which enables a faster connection establishment than TCP. This leads to shorter loading times. Better...

cURL debugging enables a very detailed evaluation of each individual cURL request. When this feature is enabled, Kitt writes a debug_log to the /log directory.Please note that this will slow down crawling and result in a higher server load. Please activate this function only in...

HTTP/3 is the successor to HTTP/2 and brings some improvements. However, it is not as if HTTP/3 completely replaces HTTP/2. Both protocols have their advantages and disadvantages and are used depending on the requirements and infrastructure of the respective web project.However, HTTP/3 is...

The Kitt Cache Crawler is one of the few and is probably the only multithread cache warmup crawler that requests URLs in parallel rather than serially. The resulting differences are striking.If the serial method is used to request the URLs in sequence, i.e. one after the other, this...