[Bug symtab/16116] New: C++ print is too slow

["jan.kratochvil at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16116

            Bug ID: 16116
           Summary: C++ print is too slow
           Product: gdb
           Version: 7.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: jan.kratochvil at redhat dot com
            Target: x86_64-unknown-linux-gnu

One print command takes about 1 second.  Each time.

(gdb) p objp->recordvector._M_impl._M_start
$1 = (std::_Vector_base<Record, std::allocator<Record> >::pointer)
0x60040000bb70

Maybe the solution will be .gdb_index produced even for local builds by gcc.
Inferior has 19MB of DWARF in this case.

Tested only with: gdb-7.6.1-42.fc19.x86_64

 27.87%  gdb  gdb          [.] lookup_symbol_aux_psymtabs
 23.74%  gdb  gdb          [.] lookup_partial_symbol.isra.3
 10.98%  gdb  gdb          [.] strcmp_iw
  3.28%  gdb  libc-2.17.so [.] _int_malloc
  2.78%  gdb  gdb          [.] symbol_natural_name
  2.72%  gdb  gdb          [.] cpname_lex
  2.44%  gdb  gdb          [.] lookup_symbol_aux_objfile
  2.13%  gdb  libc-2.17.so [.] _int_free
  2.10%  gdb  gdb          [.] cpname_parse
  2.03%  gdb  gdb          [.] strcmp_iw_ordered
  2.03%  gdb  gdb          [.] lbasename
  1.70%  gdb  libc-2.17.so [.] malloc_consolidate
  1.54%  gdb  libc-2.17.so [.] malloc
  1.30%  gdb  gdb          [.] symbol_search_name
  1.18%  gdb  libc-2.17.so [.] __strcmp_sse42
  0.93%  gdb  libc-2.17.so [.] __strlen_sse2_pminub
  0.80%  gdb  gdb          [.] symbol_matches_domain
  0.52%  gdb  libc-2.17.so [.] free
  0.52%  gdb  libc-2.17.so [.] __strchr_sse42
  0.51%  gdb  gdb          [.] lookup_objfile_from_block

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