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Re: Improving GDB startup time with large programs
>> How do I profile gdb?
>
>When you build gdb, configure as normal.
>Then use this command to build:
Here's what I got (the most significant stuff) with g++ 3.2. Seems that the number of symbols is the culprit.
Nick
--------------------------------
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
18.61 1.93 1.93 2013562 0.00 0.00 hash
13.55 3.33 1.41 9757458 0.00 0.00 strcmp_iw_ordered
11.86 4.57 1.23 2310964 0.00 0.00 htab_hash_string
9.55 5.55 0.99 6206314 0.00 0.00 read_partial_die
4.97 6.07 0.52 1906172 0.00 0.00 bcache_data
3.38 6.42 0.35 5101168 0.00 0.00 read_indirect_string
3.33 6.76 0.34 23770551 0.00 0.00 read_attribute_value
3.18 7.09 0.33 948693 0.00 0.00 d_print_comp
2.60 7.37 0.27 2032858 0.00 0.00 htab_find_slot_with_hash
1.59 7.53 0.17 9203512 0.00 0.00 read_unsigned_leb128
1.54 7.69 0.16 23770551 0.00 0.00 read_attribute
1.25 7.82 0.13 256652 0.00 0.00 find_last_component
1.25 7.95 0.13 131142 0.00 0.00 msymbol_hash_iw
1.16 8.07 0.12 6643402 0.00 0.00 dwarf2_lookup_abbrev
1.16 8.19 0.12 3934670 0.00 0.00 d_make_comp
1.06 8.30 0.11 1906172 0.00 0.00 add_psymbol_to_list
0.96 8.40 0.10 89224 0.00 0.00 cp_find_first_component_aux
0.87 8.49 0.09 19615690 0.00 0.00 symbol_natural_name
0.87 8.58 0.09 12864595 0.00 0.00 bfd_getl32
0.87 8.67 0.09 1699 0.00 0.00 scan_partial_symbols
0.77 8.75 0.08 2032858 0.00 0.00 symbol_set_names
0.68 8.82 0.07 11166899 0.00 0.00 read_1_byte