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Hi, for programs linked with lld it's substantially slower to get callstacks in gdb, in comparison to gold-linked programs. Two measurements: lld gold 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