Anyone who spends time on the video-sharing website YouTube knows the annoyance of spinning wheels. Those rotating orbs that adorn the beginning of Justin Bieber videos or interrupt cute kitten clips are both symbols of sluggish service and sources of online angst. But it’s not just YouTube’s legions of users around the world that can be frustrated by slow load times, it’s also an issue that has vexed the company’s engineers, especially Andy Berkheimer.
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