Lessons
-
Introduction
-
Search engine optimization
- Broken links
- Site map
- Micro-markup
- Robots.txt
- References
- Text
- Duplicates
- Basic
- Pictures
-
Speed
-
Minification
-
Minification of CSS to reduce its volume
Minification of JavaScript files
Minification of inline CSS code
Minification of images without loss of quality
Minification of JavaScript files to reduce its volume
Unused CSS code
Data optimization:Image URLs
Animated image format MP4 and WEBM instead of GIF and WEBP
Unused JavaScript code
Using the WebP format in images
Too high-quality images without using compression
Suitable video bitrate
-
Reducing requests
-
An overabundance of small pictures
Grouping CSS files
Grouping JavaScript files
An overabundance of font files
Availability of end-to-end CSS, JS files
The presence of a monochrome font
Uploading duplicate files
Using JavaScript facades
Redirecting JavaScript code
Adding lazy loading
Redirect from/to www version
- Fonts
-
Loading time
-
Acceptable size of the HTML code of the page
HTML code generation time
The total volume of all images on the page
Total loading time
Total page load time.
Display time of the first graphic
Optimal time to download files from the server
Time to download files from the server under load
Blocking files
- Server Settings
- Pictures
-
The first content
-
The sequence of connecting JavaScript files
Font display mode
Setting up a pre-connection
Removing lazy loading
Long JavaScript code execution time
File upload delayed or on demand
The server is located in the same country where the users of the site live
Requests to another country that cause page loading to be blocked
-
Minification
- Mobility
- Bugs
-
Convenience
- Social networks
- Web Application Manifest
- Favicons
- Basic
- Text readability
-
Security
- Encrypted connection
- Exploits
- Vulnerabilities
Acceptable size of the HTML code of the page
Opening any link in the browser, the first thing the user gets is the HTML code of the page. Its large volume is rarely justified. Large pages not only take a long time to load, but also require a lot of computing resources to display. This speeds up the energy consumption of mobile device users.
Use delayed loading. For example, in the product profile in an online store, product recommendations can be uploaded later. The user will see them in 10 seconds at the earliest when they scroll through the page.
You can also use an HTML code minifier. It will remove extra characters like extra spaces, line breaks, comments, etc. But their work can take a long time, so use them only if the code you are optimizing is cached.
Try not to exceed 120 KB of the HTML code of the page.