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[PATCH 0/3] libdw: Tweaks for optimization and clarity
- From: Josh Stone <jistone at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Wed, 10 Dec 2014 18:48:02 -0800
- Subject: [PATCH 0/3] libdw: Tweaks for optimization and clarity
While looking at performance for Mark's form-len patch, I found a few areas
that I felt could be cleaned up a bit.
1. die->abbrev initialization was duplicated in a few places.
2. dwarf_hasattr needn't look at the die at all, just abbrev.
3. CU start/end boundaries don't need to be computed from section data
every time -- just remember them in Dwarf_CU.
These patches get me back down to about 71s for "varlocs -k >/dev/null". :)
---
libdw/ChangeLog | 19 +++++++++++++++++++
libdw/dwarf_child.c | 47 ++++++++++++++++++-----------------------------
libdw/dwarf_cuoffset.c | 4 ++--
libdw/dwarf_dieoffset.c | 4 ++--
libdw/dwarf_getattrs.c | 21 ++++++++-------------
libdw/dwarf_hasattr.c | 42 ++++++++++++++++++++++++++++++++++++++----
libdw/dwarf_haschildren.c | 20 ++++----------------
libdw/dwarf_siblingof.c | 6 ++----
libdw/dwarf_tag.c | 20 +++++---------------
libdw/libdwP.h | 28 +++++++++++++++++++++++++++-
libdw/libdw_findcu.c | 6 +++++-
11 files changed, 130 insertions(+), 87 deletions(-)