Re: Introducing XAR - SquashFS based mountable executables - Calling OS/Distro Maintainers

On Jul 16, 2018, at 18:14, Nick Terrell <[email protected]> wrote:
> 
> I collected the XAR benchmark numbers. I spent some time today
> investigating what
> exactly is causing the difference between native and XAR start times. The native
> installation I was benchmarking against used `pkg_resources.load_entry_point()`
> to run the script, while XAR called the entry point directly.

> black: 0.171 s (vs 0.208 for XAR)
> jupyter-nbextension: 0.165 s (vs 0.179 s for XAR)
> 
> Without the pkg_resources difference we have a small overhead over
> native installs.

Thanks Nick, that definitely jives with our analysis.  pkg_resources can be a hidden source of significant overhead, imposed at import time.  That’s the main reason why importlib.resources was born.

Cheers,
-Barry

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