[Bug default/19355] [PERF] Libabigail slow on the r300_dri.so binary

["dodji at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19355

dodji at redhat dot com changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED

--- Comment #1 from dodji at redhat dot com ---
Let's provide more numbers and perspective to this one.

abidw --abidiff r300_dri.so, on a version of r300_dri.so that has been dwz'ed
is even slower.  On my system, it's taking ~ 53 minutes and it's aborting!!!

So the priority now is to reduce the time taken on the dwz'ed version.

Profiling showed that most of the time is taken during what we could call the
"decompressing phase".  Basically, getting the logical parent of a debug
information entry (aka DIE) that has been imported (using the
DW_TAG_imported_unit kind of DIE) is what's taking the most time.

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