Super Fast Compression and Decompressionįor data compression and decompression speeds, GZIP is the clear winner. Typically, it can help you reduce the size of text-based resources by 70-90%. But it’s not that far off from them either. Let’s take a closer look at the most important advantages of GZIP compression.Īs discussed before, GZIP doesn’t have the best compression ratio compared to its competition. It’s also used in the lossless PNG file format for compressing images. Note: An abstraction of GZIP’s compression library called zlib is used in many popular operating systems (Linux, macOS, iOS) and modern gaming consoles (PlayStation 4, Wii U, Xbox One). Considering all its positives in advancing the web, IETF ratified GZIP as one of the three standard formats for compression in HTTP/1.1. Looking at the compression speed graph, we can conclude that GZIP is ideal for real-time compression in HTTP servers and other data streams on the web. GZIP loses out in the compression ratio test by a slight margin, but for compression and decompression speeds, it beats the competition outright. The charts above compare the compression performance of brotli, bzip2, gzip, and xz compression algorithms. Every ASCII character in UTF-8, which also includes the English alphabet, uses 1 byte (8 bits).Ĭompression performance of brotli vs bzip2 vs GZIP vs xz (Source: OpenCPU) This word has a good mix of single, double, and triple letters.Īlmost all websites use UTF-8 character encoding to represent letters and symbols. It’s 10 characters long, but it has only 6 unique characters. To understand how Huffman coding algorithm works, consider the word BOOKKEEPER. This technique is like the one used in Morse code, wherein letters occurring more frequently in the English language get the shortest sequences. It does this by assigning characters occurring more frequently the least number of bits, while assigning rare characters the highest number of bits. The size of the sliding window plays a key role in LZ77 compression performance.Īfter compressing the raw data with the LZ77 algorithm, the GZIP compressor then uses the Huffman coding algorithm to compress it further. However, GZIP compression can use a maximum sliding window size of 32 KB (32,768 bytes). In the above example, the sliding window size is just 13 characters long (13 bytes). It’s based on the DEFLATE algorithm, which is a mixture of LZ77 encoding and Huffman coding algorithms.Īn illustration of the LZ77 encoding algorithm
#Speed up xz compression software
gz) and a software used for file compression/decompression. It allows you to reduce the size of your site’s HTML pages, stylesheets, and scripts.Īpart from being a data compression algorithm, GZIP is also a file extension (. GZIP, short for GNU Zip, is the most popular lossless data compression method on the web. It enables efficient data transmission and has contributed significantly to make the internet a viable global communications medium. One of the most popular examples of such a data compression method is GZIP. Using advanced math techniques, data compression algorithms can further reduce the size of data.
Content-specific reductions like these are the first step in optimizing the size of your website’s text-based assets.īut there’s more to data compression than just minification. Likewise, the same compression techniques described above can optimize other content types like images, videos, fonts, and more. Most WordPress performance plugins take care of this automatically for you.įile size compression of uncompressed vs minified jQueryĪs an example, the uncompressed version of jQuery 3.5.1 library is more than 3 times bigger than the minified version of the same file.
#Speed up xz compression code
To take advantage of both the versions, you can maintain the original document as a “development version,†but minify all the code before pushing it live. It’ll still display the same page to the user. That’s a 60.50% savings in the number of characters. It’s not as easy on the eyes, but that doesn’t matter to the browser. kinstaScripts() Īfter minification, the HTML document reduces to just 141 characters. * kinsta-banner is used on the homepage only */. Overall, this HTML document has 357 characters in total. In the example below of a simple HTML document, there are three content types: HTML markup, CSS styles, and JavaScript code.Įach content type has unique syntax and semantics. Here, the minifier compresses the text by removing unnecessary characters such as comments and whitespaces from the source code. For instance, minification of HTML, CSS, and JavaScript is a simple way to reduce the amount of data sent by browsers.
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