Progress output during format conversion

[sparrowt]

Description

It would be lovely to have some CLI progress output during format conversion, otherwise it's hard to know if something is hung / how long you're going to need to wait.

I've thought this before but just filing this for now before I forget - not sure I'll have time to submit a PR at the moment.

Steps to Reproduce

1. Record a significant sized austin trace (e.g. I've had some ~5GB when trying to diagnose a memory leak for example)
2. Run austin2speedscope trace.austin trace.json

Expected behavior: Some progress output so that I don't give up / have an idea how much time I have to fill with another task

Actual behavior: Zero console output

Reproduces how often: 100%

Versions

austin-python==1.7.1

[sparrowt]

I've thrown some absolute basics here:
main...sparrowt:show-progress

It doesn't tell you how far through you are relative to any total, but at least you can see that things are still happening.

[P403n1x87]

That's a very good point. Not having any feedback when it takes a long time to convert a big file is not ideal. I think a byte-based approach might be the way to go here. We could add a progress attribute to both AustinFileReader and MojoFile that can be used by a background thread to display the progress. WDYT?

[sparrowt]

Actually I did add some more to main...sparrowt:show-progress since my comment above, so the 2nd commit now prints out bytes-based progress without any threading (though no Mojo yet).

I can open a PR from that branch if you think it's an acceptable approach

[P403n1x87]

I can open a PR from that branch if you think it's an acceptable approach

Ah that would be great 🙏 . The reason I mentioned threads is that I was envisioning a generic solution that can be used with any parsing class. Benefits that I can think of would be:

• keep presentation logic separate from the data model
• code re-use
• works for both TUIs and GUIs (potentially any UI really)

Do you reckon we can go in this direction with your changes?

[sparrowt]

Yeah that's a fair point - currently I don't have time to dedicate to this any more (sorry!) but I've opened #32 for now if you're willing to consider it as an interim / stepping stone.