Time to format this JS file is ~1 minute using python version

[Alexey-T]

Take the file bundle.js from Vivaldi installation. 3.7Mb.

bundle.zip

I format this file by 'CudaFormatter plugin for CudaText' with 'Formatter for JS and JSON'. It uses this engine (v1.15.3).
https://github.com/CudaText-addons/cuda_fmt_js

Time to format is about 1 minute on CPU Intel core i3 3GHz. Why so long? Can formatter be faster?

[bitwiseman]

That's a rather large js file, but 1 minute is definitely a long time.
...
Oh, wait, that addon is running the python version of the beautifier which is much, much slower. (edited the issue title for clarity)

I'm not sure what could be done to improve this. I'll keep this open for anyone who might be interested in working on it.