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I wish him luck, though having implemented a significant part of git in JavaScript myself, I wonder how well the end result will work - JavaScript does not do well with either large downloads or processing binary data, and git involves a lot of both.

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Javascript is getting better with at least the latter thanks to typed arrays - https://developer.mozilla.org/en-US/docs/JavaScript/Typed_ar...

That's a start, but it's more suited for smaller tasks I think, with the main benefit being that you don't have to clutter your code with type conversion. A string with custom (no) encoding does fairly well for holding the binary data as is.

It was actually memory/GC issues that got me to give up on the js implementation - it's very hard to prevent js from creating huge numbers of temporary variables, which then cause the system to freeze for several seconds while they are cleaned up.

is your implementation publicly available? I'd like to take a look at it

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