[Bug binutils/22802] New: massive performance regression for `readelf -n`

[robert at ocallahan dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=22802

            Bug ID: 22802
           Summary: massive performance regression for `readelf -n`
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: robert at ocallahan dot org
  Target Milestone: ---

`readelf -n /usr/lib/debug/usr/lib64/libwebkit2gtk-4.0.so.37.13.10.debug` takes
0.006s in 2.29-6.fc27. It takes 58s in 2.29.51 (built from gdb-8.1-release).

Transcript:

address@hidden code]$ /usr/bin/readelf --version
GNU readelf version 2.29-6.fc27
Copyright (C) 2017 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
address@hidden code]$ time /usr/bin/readelf -n
/usr/lib/debug/usr/lib64/libwebkit2gtk-4.0.so.37.13.10.debug

Displaying notes found in: .note.gnu.build-id
  Owner                 Data size       Description
  GNU                  0x00000014       NT_GNU_BUILD_ID (unique build ID
bitstring)
    Build ID: 0607995fe748bcac5e22ed63835154bcf58173cb

Displaying notes found in: .note.gnu.gold-version
  Owner                 Data size       Description
  GNU                  0x00000009       NT_GNU_GOLD_VERSION (gold version)
    Version: gold 1.11

real    0m0.006s
user    0m0.001s
sys     0m0.001s

address@hidden binutils-gdb]$ readelf --version
GNU readelf (GNU Binutils) 2.29.51
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
address@hidden binutils-gdb]$ time readelf -n
/usr/lib/debug/usr/lib64/libwebkit2gtk-4.0.so.37.13.10.debug

Displaying notes found in: .note.gnu.build-id
  Owner                 Data size       Description
  GNU                  0x00000014       NT_GNU_BUILD_ID (unique build ID
bitstring)
    Build ID: 0607995fe748bcac5e22ed63835154bcf58173cb

Displaying notes found in: .note.gnu.gold-version
  Owner                 Data size       Description
  GNU                  0x00000009       NT_GNU_GOLD_VERSION (gold version)
    Version: gold 1.11

real    0m57.550s
user    0m54.845s
sys     0m1.227s

-- 
You are receiving this mail because:
You are on the CC list for the bug.