[openstack-dev] [all] ujson "drop in" replacement

Graham Hayes gr at ham.ie
Wed Nov 1 19:00:05 UTC 2017

Hey all,

There seems to be a lot of "replace oslo.serization / native python json
with UltraJSON (otherwise known as ujson) patches over the last few

We should be careful - it is not a drop in replacement. e.g. -

Normal python JSON:

    >>> import json
    >>> json.dumps({"url":"https://google.com"})
    '{"url": "https://google.com"}'


    >>> import ujson as json
    >>> json.dumps({"url":"https://google.com"})

It is not currently in use in many projects:

    curl -X POST http://codesearch.openstack.org/api/v1/search -F
q=ujson -F repos='*' -F files="requirements\.txt" -f  -s | jq '.Results
| keys'

I personally do not see the point in adding another dependency that has
weird behaviour for an as yet unmeasured performance increase.

- Graham

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