[llvm-dev] [LLD] Slow callstacks in gdb
Martin Richtarsky via llvm-dev
llvm-dev at lists.llvm.org
Mon Nov 27 07:00:10 PST 2017
for programs linked with lld it's substantially slower to get callstacks
in gdb, in comparison to gold-linked programs. Two measurements:
15 sec 3 sec
6 sec 2 sec
This is a debug build, rather large binaries (lots of templates). I have
seen even worse performance for debug+UBSan builds. I think code size (and
therefore DWARF size) has an impact. Is there some information missing
that gdb needs, and only gold generates?
gdb version is 8. I tested lld 5.0 and an earlier 4.0 trunk version.
Note that these binaries do not use gdb indexing.
Has anyone seen something similar?
More information about the llvm-dev