Two things were true about our video upscaler when this round started: it was honest about being slow, and we had no idea whether it was any good. The first half is fixable on paper. The second half is why we spent a week building a ruler before touching a single line of the optimizer.

Source: [Dev.to](https://dev.to/sharksevenro/upscale-video-to-4k-without-uploading-it-up-to-7x-faster-sharper-and-nothing-leaves-your-laptop-5495)

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