Analysis: Size and Loading Times of WordPress.com Blogs

In the fast paced online world people are not so patient as in real life. Accordingly, having a large home page size and loading time can negatively affect your blog traffic. Studies have shown that the greater the loading time, the higher the bounce rate. To find out how well my blog performs with respect to this (feel free to use the results for your benefits as well), I did a analysis of 70 WordPress.com blogs. I used iWEBTOOLS’s Website Speed Test and OriginPro for that. With the tool you can analyze ten webpages at once, but note that after ten queries you have to wait a full day (not an hour as the website claims) to do more analysis.

The average size of a WordPress.com blog according to the analysis is 65.3 KB with a standard error SE = 3.0 KB. Here’s how the size is distributed:

WPSize

The average loading time at my internet speed (circa 600 KB/s) is 0.66 s with the standard error SE = 0.10 s. Here’s the corresponding distribution:

WPLoading2

Note that the graph obviously depends on your internet speed. If you have faster internet, the whole distribution will shift to the left. My blog has a home page size of 81.6 KB. From the first graph I can deduce that only about 24 % of home pages are larger in size. My loading time is 0.86 s, here only about 22 % top that. So it looks like I really have to throw off some weight.

Here’s the loading time plotted against the home page size:

WPLoadingSize

In a very rough approximation we have the relation:

loading time = 0.009 * size

In other words: getting rid of 10 KB should lower the loading time by about 0.1 seconds. Now feel free to check your own blog and see where it fits in. If you got the time, post your results (if possible including URL, size, loading time, internet speed) in the comments. I’d greatly appreciate the additional data. For a reliable result regarding loading time it’s best to check the same page three times and do the average.

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