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Pedro Alves 4b76cda993 .gdb_index prod perf regression: mapped_symtab now vector of values
... instead of vector of pointers

There's no real reason for having mapped_symtab::data be a vector of
heap-allocated symtab_index_entries.  symtab_index_entries is not that
large, it's movable, and it's cheap to move.  Making the vector hold
values instead improves cache locality and eliminates many roundtrips
to the heap.

Using the same test as in the previous patch, against the same gdb
inferior, timing improves ~13% further:

  ~6.0s => ~5.2s (average of 5 runs).

Note that before the .gdb_index C++ifycation patch, we were at ~5.7s.
We're now consistenly better than before.

gdb/ChangeLog
2017-06-12  Pedro Alves  <palves@redhat.com>

	* dwarf2read.c (mapped_symtab::data): Now a vector of
	symtab_index_entry instead of vector of
	std::unique_ptr<symtab_index_entry>.  All users adjusted to check
	whether an element's name is NULL instead of checking whether the
	element itself is NULL.
	(find_slot): Change return type.  Adjust.
	(hash_expand, , add_index_entry, uniquify_cu_indices)
	(write_hash_table): Adjust.
2017-06-12 17:06:26 +01:00
bfd ELF: Pass bfd_link_info to merge_gnu_properties 2017-06-12 07:37:56 -07:00
binutils Fix memory leaks in the sysinfo program. 2017-06-06 14:52:31 +01:00
config
cpu
elfcpp
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gas [ARC] Don't convert _DYNAMIC@ to _GLOBAL_OFFSET_TABLE_ 2017-06-08 19:00:35 +02:00
gdb .gdb_index prod perf regression: mapped_symtab now vector of values 2017-06-12 17:06:26 +01:00
gold 2017-06-07 Eric Christopher <echristo@gmail.com> 2017-06-07 17:52:37 -07:00
gprof
include ld: Allow section groups to be resolved as part of a relocatable link 2017-06-06 09:53:38 +01:00
intl
ld x86-64: Add some x32 ELF property tests 2017-06-09 10:43:43 -07:00
libdecnumber
libiberty Avoid compilation warning on MinGW in xstrndup 2017-05-31 09:44:08 +03:00
opcodes S/390: idte/ipte fixes 2017-06-01 15:06:17 +02:00
readline Avoid MinGW compilation warning in readline/input.c 2017-05-19 11:05:59 +03:00
sim Correct check for endianness 2017-06-02 08:04:59 -07:00
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.