https://sourceware.org/bugzilla/show_bug.cgi?id=29080
Bug ID: 29080
Summary: Slow readelf -S when having a separate debug info for
a binary
Product: binutils
Version: 2.37
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: mliska at suse dot cz
Target Milestone: ---
$ time readelf -S /usr/lib64/thunderbird/libxul.so
There are 33 section headers, starting at offset 0x85e4bc0:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .note.gnu.bu[...] NOTE 0000000000000270 00000270
...
[32] .shstrtab STRTAB 0000000000000000 085e4a80
000000000000013f 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
L (link order), O (extra OS processing required), G (group), T (TLS),
C (compressed), x (unknown), o (OS specific), E (exclude),
D (mbind), l (large), p (processor specific)
real 0m5.553s
user 0m5.110s
sys 0m0.440s
based on perf the most time is spent here:
99.62% readelf readelf [.] check_gnu_debuglink.lto_priv.0
0.13% readelf libc.so.6 [.] __GI__IO_file_xsgetn
while:
$ time eu-readelf -S /usr/lib64/thunderbird/libxul.so
...
real 0m0.007s
user 0m0.004s
sys 0m0.004s
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