Difference between parsoid --standalone and --integrated mode

[srg9000]

I am using parsoid from cli using `php parsoid/bin/parse.php --wt2html --integrated --inputfile file`. I checked the code and there are 2 modes, --integrated and --standalone. What is the difference between both? --standalone had some errors, for that I had to add some classes to vendor/autoload.php but it is slower (and causes http 429 error when i try to parse ~100 files).