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This looks like it just shells out[1] to a local executable.

It'd be remiss not to mention my own Ruby gem, https://github.com/gjtorikian/mathematical. It does La/TeX conversions by wrapping C code, though admittedly, it only converts the math portions.

[1]: https://github.com/Authorea/latexml-ruby/blob/798795f0631a29...

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If you're using it in daemon mode, it only shells out to boot a conversion server, and only if necessary.

From that point on it's sending very basic RESTful requests. I wouldn't recommend using latexml if you're interested in performance-critical math parsing.

Its best use case is converting entire LaTeX documents/fragments with arbitrarily complex package dependencies, macro definitions and any other power latex techniques.

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