How many users block Google analytics? (2017)
Comparing Google Analytics with server logs
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Comparing Google Analytics with server logs
A while ago, I was curious how the speed of document.getElementById compared to document.querySelector in Javascript for selecting a single element by ID. querySelector has to do a lot more work, so one would expect that it would be slower, but I didn't know if the difference was enough to care about.
I've been doing a bit of work cleaning up the CSS on this blog in the past couple days — the CSS is from a template that I copied more than five years ago at this point, and it was pretty crufty even when I first got it.