Add duration property to completed jobs

It would be nice if jobs would track how long they took to execute. If they already do, that’s great, but it wasn’t obvious from the docs or the properties on the job object how they do that.

Suggestion:

//Track high res start time
const startTime = process.hrtime();

//Run job handler
//...do stuff...

//Track high res end time
const endTime = process.hrtime();

//Get duration in MS
const ms = (end[0] - start[0]) * 1e3 + (end[1] - start[1]) * 1e-6;

//Store on completed job
job.duration = ms;

Currently doing this manually, but it would be nice if this was implemented in bullmq internally.

[manast]

but of course we could add a new sets of properties ending in hr for the high resolution version like onProcessedHr, etc.

[adamreisnz]

Yes that would be great. Personally I would also rename the properties to be a bit clearer, as it’s quite confusing if you don’t know BullMQ well. E.g. startedOn, completedOn is clear just from reading it, whereas processedOn could be interpreted in different ways. I realise this would be a breaking change though.