Not sure when it started happening, but Twitter on my browser is really slow. By slow, I mean the UI responds slowly. Specifically, when I type in the tweet textarea, each letter takes about a second to appear. Even after I finish typing the letters take some time to catch up. At first I thought maybe all those hours on typing tutor really paid off. But, no: the browser was unresponsive and CPU activity soared. Something weird was happening in the Javascript.
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