[bug] conan create lock is orders of magnitude faster with --build="*"

[rconde01]

Describe the bug

I'm not sure if this is a bug per se, but it was surprising and is probably at least a documentation issue. Using Conan 2.3, I was working on my update to conan 2.0 and conan lock create was taking a couple seconds for each combination, and I have 5-platforms7-conan-files2-configs...taking a total of ~330 seconds. Adding --build="*" sped it up to ~30 seconds. The additional time appears to be in "Computing necessary packages". It's unclear to me why locking cares what packages are in the remote?

How to reproduce it

No response

[memsharded]

Hi @rconde01

Thanks for your report.
I think this might be expected for cases where there are a ton of tool_requires, that are not really installed locally in the current cache.

Can you please report a bit more about the problem, for example, how many dependencies are in each configuration, I guess that is assuming a blank cache and things are being downloaded, or even when the cache is populated?