Hello list,
there was some discussion on #sofia-sip about the size of libsofia-sip-ua,
and how to minimize it for embedded applications. The figures posted were
quite high, so I decided to do some testing myself.
Testing method
--------------
- tests done with darcs versions of sofia-sip and sofsip-cli
- compile sofsip_cli A) normally link dynamically against all
the libraries, B) with static linkage of libsofia-sip-ua, other
libs still dynamically linked
- measure the binary size increament 1->2
Notes/assumptions
-----------------
- note: if you link statically againt sofia-sip as in these tests, your
application has be LGPL/GPL licensed as well; otherwise you need to link
dynamically
- it's a sensible assumption that you will anyways have the
full POSIX runtime installed (and not just picking those parts
of it needed by the SIP client from libc) -> not measuring the amount
of code used from libc
- same with SSL, if you need it, you probably have to whole library
installed -> not measuring the amount of code used from libssl
- our glib/gobject wrappers are not taken into consideration here
(especially as their use is optional)
- test compiler gcc-4.0.1 with default settings ("-O2")
Results
-------
1) sofia-sip compiled without any extra options, debug symbols stripped:
./configure && make all install
- sofsip_cli size: A) 93336, B) 1020248 bytes
=> size increase: 905K
2) sofia-sip without any debugging messages, debug symbols stripped:
./configure && make CPPFLAGS="-DSU_DEBUG_MAX=0" all install
- sofsip_cli size: A) 93336, B) 918872 bytes
=> size increase: 806K
How to cut down the size even more
----------------------------------
Going even lower is possible, but requires some manual tuning. You need to
check which stack features you an live without, and disable those by hand
(patches that add ./configure flags for these are welcome). Possible
candidate features are: TLS (in 'tport'), STUN (all of 'stun'), HTTP stack
(all of 'http'), DNS resolving (all of 'sresolv'), SIMPLE features
('nea' module), etc
--
under work: Sofia-SIP at http://sofia-sip.sf.net
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