[Rpm-maint] [rpm-software-management/rpm] rpm query directory performance (#1770)

Panu Matilainen notifications at github.com
Tue Sep 7 08:52:39 UTC 2021


Lots of people have gone ZOMG over the stat()'s. That's not where the time is spent, it's spent on database hits and verifying fetched headers and whatnot. BDB performance can degrade badly over time,  --rebuilddb can make a *huge* difference to performance, and also --nosignature --nodigest (just to reduce processing).

As for having to stat around for `lib`, rpm is looking for paths that may be identical to that and also provide the same thing. This is known as fingerprinting, and without that eg /usr merge would not have been possible. 

Finally, nothing, I mean *zero*, is going to be done to rpm 4.11 at this point. 

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