I don't think of JavaScript _the language_ as slow, I think of JavaScript _the object model_ as slow, and it is, pretty much period. If you just wanted to do basic stuff in JavaScript it's fine, even at high load, but if you want to work with structured data it falls apart.
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That said, in capturing those perfs I did see a disturbing amount of variability across runs of the same page/script in Chrome :( So one significant caveat here might be that I guess I don't know if Chrome has some bad bugs in here that are making these perf results suspect?
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I'm on a local machine and it's 1 image, 1 HTML file, and 1 js file, so I would not have expected there to be a lot of variability in the perf capture but there was. Especially in the part that happened before the script actually executed, which isn't relevant here, but still.
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Since when do you do web work? What are you working on?
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I did our whole website set - CMS, frontend, and mailing list / github auth / twitch status backend (http://mollyrocket.com , http://meowtheinfinite.com , http://handmadehero.org , etc.)
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