Stoyan's (always excellent)
Performance Calendar went live today with an
article I provided looking at the state of performance optimization in 2010 compared to 2008 (based on the tests run on
WebPagetest). I highly recommend reading the article when you get a chance - there's lots of data and graphs. One thing that struck me was how poorly even the most basic optimizations were being followed. I thought it would be interesting to summarize it all into a single easy-to-understand table. So, without further ado....
Percent of sites that got a passing grade for the basic optimization checks:
| Optimization | Percent of pages with a passing grade (2010) |
|---|
| Keep-alive Enabled | 85% |
| Compress Text | 43% |
| Compress Images | 39% |
| Cache Static Content | 15% |
| Combine JS/CSS | 47% |
| CDN Usage | 12% |
These aren't the advanced optimizations - they're the most basic. Only 15% of pages are effectively leveraging the browser cache! (and "passing" is pretty generous here - a score of 80 or better).
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