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Re:Give Me Back My Monolith by mcguire on Wednesday March 13, 2019 @10:57PM (#19386169)
I'm going to go out on a limb here and suggest that parsing (and serializing) JSON is unlikely to be the actual problem, performance-wise. (Although "OpenAPI/Swagger" doesn't fill me with enthusiasm.)

More likely, I suspect, is that either you are shipping way too much data around, you have too much synchrony, or some other problem is being being hidden in the distribution. (I once dealt with an ESB service that took 2.5 seconds to convert an auth token from one format to another. I parallelized the requests, and the time to load a page went from 10 sec to <3; then I yanked the service's code into our app and that dropped to milliseconds.)

Performance problems in large distributed systems are a pain to diagnose and the tools are horrible.

Re:Give Me Back My Monolith by therealdrag0 on Sunday March 17, 2019 @02:07AM (#19412492)
I've been using NewRelic and it's been wondrous around illuminating performance problems.