```json
{
    "title": "Heavy-Tail Distribution in Web Performance Data",
    "url": "https://performancezen.com/2005/01/06/heavy-tail-distribution-in-web-performance-data/",
    "datePublished": "2005-01-06",
    "dateModified": "2005-01-06",
    "language": "en-US",
    "description": "I found a great example of a Heavy-Tailed Frequency distribution in my performance data today. This clearly shows how data in the wild can be distributed in a non-normal fashion.…",
    "author": "spierzchala",
    "publisher": "Performance Zen"
}
```

# Heavy-Tail Distribution in Web Performance Data

I found a great example of a Heavy-Tailed Frequency distribution in my performance data today.
[http://www.flickr.com/photos/spierzchala/3438163297/](http://www.flickr.com/photos/spierzchala/3438163297/)

This clearly shows how data in the wild can be distributed in a non-normal fashion. In this case, there is a very heavy weight on the end of the tail, not simply a few straggling outliers.
It has become very unusual to find sites that exihibit this degree of heavy-tailed behaviour  over the last year. When I started in this industry, this was more the norm than the exception.