It would be lovely if you introduce a timestamp in the JSON output, so that if I probe with this app every few minutes I would know the probe time.

For the moment I need to transform the JSON output each time the app completes, or if we can have append custom object application arguments with data generated from somewhere else.
E.g:
speed-test -v -j -d '{"ts": "fdffd", "hostname": "pc1"}'

that way you don't have to change a lot, just at the end of the result generation to merge the arguments object.

Thanks.