Are there any ways in which I can improve the loading speed of a website?
I know that Google is really pushing loading speeds and with the popularity of mobile websites it's now imperative that sites load quickly.
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I strongly recommend using either Google's or Yahoo's page speed add-ons to test out your pages. It's fast and easy to do and offers clear guidance on how to improve your page speeds.
As recommended by Nick in the comments here are some more good resources and information:
Here's come good stats that shows why page speed is important (source)
Amazon: 100 ms delay caused a drop in revenue.
Google: 400 ms delay caused a 0.59% decrease in search requests per user.
Yahoo!: 400 ms delay caused a 5-9% decrease in traffic.
Bing: 2 seconds delay caused a 4.3% drop in revenue per user.
Mozilla made their download page 2.2 seconds faster and was rewarded with an increase of 15.4% in downloads.
Google Maps reduced the file volume by 30% and observed a 30% increase in map requests.
Netflix, which uses Appdynamics to monitor their performance, enabled gzip on the server; simply by this single action pages became 13-25% faster and saved 50% of traffic volume!
Shopzilla succeeded in reducing the loading time from 7 down to 2 seconds, whereby the conversion rate increased by 7-12%, they observed a 25% increase in page requests, they were able to retire 50% of their servers, thus saving energy costs.
AOL observed the number of page views on several websites. While the fastest users requested 7-8 pages, the slowest only viewed 3-4.
Edmunds got down from over 10 seconds to less than 2, adding 17% page views and increasing revenue by 3%.
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