The performance of websites has always been critical. A well-performing website improves the user experience a lot. This translates into your audience coming back, staying longer and converting a whole lot better. A better performing site usually also appears higher in the search results because the indexer is having less problems with it. Also, mobile and smart devices have become so significant today that a website cannot afford to work at snail’s pace and without the proper optimizations.

We – as a bug tracking tool – have seen many issues on websites which not only killed the website performance, but also lead to unhappy users and customers.

Here are the most annoying issues which kill website performance and make users unhappy.