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    I’ve worked at a number of places and the financial reporting always seems to get a bunch of technology and take hours. We’re talking about something that, up until recently, was done by hand by humans.

    I can understand that the policies around when to subtract, add, and multiply and by what are complicated but I never understood why the execution took so long. I’m reminded of the COST paper. Maybe I’m just showing my own ignorance but if their financial reporting takes 4 - 5 hours on a Hadoop + Spark cluster, I would not be surprised if you could do the same thing in under an hour on one computer.