[wdmmg-dev] Depend on a faster json library

[Carsten Senger]

Hi all,

while working on api/2/aggregate I found that json.dumps consumes ~ 66% of
the request time in bigger queries. Can we depend on a faster json
generator like ujson or cjson? With both it drops to ~ 7 %.
For a very big query it's 33 -> 1.5 seconds for json generation.

I'd like to depend on ujson. It's maintained and cjson had no release for 3
years, but a buffer overflow vulnerability last year that is only fixed by
distributions, but not on pypi.

..Carsten