1. Gzip Compression Ratio For Text
2. Gzip Compression Tool
3. Gzip Compression Test
4. Gzip Compression Wordpress

However, GZIP compression can use a maximum sliding window size of 32 KB (32,768 bytes). The size of the sliding window plays a key role in LZ77 compression performance. After compressing the raw data with the LZ77 algorithm, the GZIP.

Defining GZIP Compression GZIP’s purpose is the compression of files. It’s a server-side product that reduces the size of JavaScript files, stylesheets and HTML. Some WordPress users have reported a. Website gzip compression makes it possible to reduce the file size of a web file (like HTML, PHP, CSS and Javascript files) to about 30% or less of its original size before these files get sent to the browser. Offers you the power to enable and disable Gzip compression on your WordPress site. Supports Apache HTTP Server. If you need help or plugin is not working for you, consider the premium.

Enable text compression

Text-based resources should be served with compression to minimize total network bytes. The Opportunities section of your Lighthouse report lists all text-based resources that aren't compressed:

How Lighthouse handles text compression #

Lighthouse gathers all responses that:

• Have text-based resource types.
• Do not include a content-encoding header set to br, gzip, or deflate.

Lighthouse then compresses each of these with GZIP to compute the potential savings.

If the original size of a response is less than 1.4KiB, or if the potential compression savings is less than 10% of the original size, then Lighthouse does not flag that response in the results.

The potential savings that Lighthouse lists are the potential savings when the response is encoded with GZIP. If Brotli is used, even more savings are possible.

How to enable text compression on your server #

Enable text compression on the server(s) that served these responses in order to pass this audit.

When a browser requests a resource, it will use the Accept-Encoding HTTP request header to indicate what compression algorithms it supports.

If the browser supports Brotli (br) you should use Brotli because it can reduce the file size of the resources more than the other compression algorithms. Search for how to enable Brotli compression in <X>, where <X> is the name of your server. As of June 2020 Brotli is supported in all major browsers except Internet Explorer, desktop Safari, and Safari on iOS. See Browser compatibility for updates.

Gzip Compression Ratio For Text

Gzip Compression Tool

Use GZIP as a fallback to Brotli. GZIP is supported in all major browsers, but is less efficient than Brotli. See Server Configs for examples.

Your server should return the Content-Encoding HTTP response header to indicate what compression algorithm it used.

Check if a response was compressed in Chrome DevTools #

To check if a server compressed a response:

1. Press Control+Shift+J (or Command+Option+J on Mac) to open DevTools.
2. Click the Network tab.
3. Click the request that caused the response you're interested in.
4. Click the Headers tab.
5. Check the content-encoding header in the Response Headers section.

To compare the compressed and de-compressed sizes of a response:

1. Press Control+Shift+J (or Command+Option+J on Mac) to open DevTools.
2. Click the Network tab.
3. Enable large request rows. See Use large request rows.
4. Look at the Size column for the response you're interested in. The top value is the compressed size. The bottom value is the de-compressed size.

See also Minify and compress network payloads.

Stack-specific guidance #

Gzip Compression Test

Joomla #

Enable the Gzip Page Compression setting (System >Global configuration >Server).

WordPress #

Enable text compression in your web server configuration.

Resources #

Gzip Compression Wordpress