10 Reasons why your website is slow and it's takeaway.

#javascript #webdev #beginners #tutorial

Intoduction

Do you know a slow website kills conversion? 47% of customers expect a website to load in two seconds at the very most. 40% will abandon it altogether if it takes longer than three.

So let's discuss what makes your website slow and we can fix it.

1. Unoptimized Image

Check your image files that are above 1 MB is totally unacceptable.
Use JPEG instead of PNG, especially for large images.
Use the waterfall test to easily scan your site and suggest corrective actions.

Website Speed Test | Pingdom Tools

Full Page Test Analysis

tools.pingdom.com

2.JavaScript Issue.

Audit your JavaScript scripts. So what is really needed and remove what you don't.
Asynchronous loading is a must.
Use Google Tag Manager or Segment. A single script for all your tools.

3.Too much flash content.

Look for HTML5 replacements.

4. Excessive HTTP Requests.

Use Sprites to reduce HTTP requests.
Reduce the number of total files the user will have to download.
Minify your CSS and JavaScript files.

5. Not making use of caching.

You can cache CSS, and javascript files on client side and you can cache database queries on the server side.

Note: If you can cache something then do it. But do it carefully so you don't mess with something which can raise "cache invalidation" error.

6.Unclean code.

Don't be lazy and use inline CSS when possible.
Remove unwanted comments and lines from JavaScript and CSS files.

7. Files compression.

Use G-Zip compression. It wraps all your files into a single container so the server response fast.

8.Too many ads.

Ads requires additional HTTPS request so it increases the load time.

9. CDN

Use CDS'N service. CDN helps to cache your whole website into various node servers available across the globe so your website loads fast.
Examples: Cloudflare, Fastly, Akami, etc.