What all vendors claim to do is capture data from 100% of your users. When looking closer you see that many of these solutions – especially the “Freemiums” – rely on the W3C Navigation Timings. So my question is: How can I cover ALL Users with W3C timings when these timings are NOT AVAILABLE on all browsers?
W3C timings are only available on new browsers. So –what about the IE6, IE7, IE8, the whole Safari Browser family, older Firefox and Chrome instances? Looking at current statistics they sum up to 35% of the overall market share (http://www.w3counter.com/globalstats.php). The statements of vendors that rely on these timings to capture all users experience are simply not accurate.The performance impact of monitoring
After finding that out I just asked myself: “Are there anymore deficiencies that can be found?”