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From: "dje at google dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug symtab/17604] Stop demangling ELF symbols, at least by default
 when we have DWARF
Date: Wed, 19 Nov 2014 19:48:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=17604

--- Comment #3 from dje at google dot com ---
Additional data.
The memory measurement used here is just gdb's internal one, which uses the brk
line, so take into account fairly large error bars here.
Still, I think the numbers are educational.

With my standard monster benchmark:

Without demangled ELF syms:

(gdb) mt set per on
(gdb) file foo
[...]
Command execution time: 2.530785 (cpu), 3.364821 (wall)
Space used: 241299456 (+237711360 for this command)
#symtabs: 5695 (+5695), #primary symtabs: 86 (+86), #blocks: 1061 (+1061)

With demangled ELF syms:

(gdb) mt set per on
(gdb) file foo
[...]
Command execution time: 11.107160 (cpu), 11.104109 (wall)
Space used: 722186240 (+718598144 for this command)
#symtabs: 5695 (+5695), #primary symtabs: 86 (+86), #blocks: 1061 (+1061)

-> ~480MB increase

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