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Frediano Ziglio 1804b8bb85 improve performances comparing image pixels 
This patch contains a bit of small optimizations.
It avoid boolean	 operations which could involve branches replacing
with binary operations (equal/all_ident -> some_differences).
The other optimization avoids the use of ABS. First the way the macro
was used (with a large expression) was not easy to optimize by the
compiler.
Then instead of using ABS a much simpler range check is used so instead
of (ABS(n) >= k) a ((n) <= -k || (n) >= k) is used. This looks small
but modern compilers can translate this not in range check in a couple
of machine instructions (and a single compare).

Using operf on same samples (using spice-server-replay) and trying 2 runs
I got

run             1       2
-------------------------
before    104441   106267
after      92387    91083

So the performance increase is about 13%.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Jonathon Jongsma <jjongsma@redhat.com>
2015-09-04 11:04:09 +01:00
build-aux Update git-version-gen to latest version 2013-12-11 16:32:36 +01:00
docs manual: Add missing closure of XML tag 2014-11-17 17:56:08 +01:00
m4 m4: WARN FLAGS: Drop -Wenum-compare 2015-03-15 13:57:12 +02:00
server improve performances comparing image pixels 2015-09-04 11:04:09 +01:00
spice-common@449c5da90f Update spice-common submodule 2015-09-01 15:52:00 +02:00
tests tests/migrate.py: add --vdagent 2011-08-23 17:01:14 +03:00
tools Add casts for compatibility purposes 2012-02-14 10:44:49 +02:00
uncrustify_cfg fresh start 2009-10-14 15:06:41 +02:00
.gitignore Don't ignore all of m4/ in .gitignore 2013-10-10 11:17:17 +02:00
.gitmodules Use the spice-common submodule 2012-03-25 18:59:10 +02:00
.mailmap Add recent new committers to AUTHORS file / mailmap 2012-04-25 09:49:29 +01:00
AUTHORS syntax-check: update AUTHORS 2013-07-16 23:37:28 +03:00
autogen.sh build-sys: Pass --enable-python-checks when running autogen.sh 2015-04-23 10:38:24 +02:00
cfg.mk Add a few more syntax-check exemptions 2012-04-25 09:49:32 +01:00
ChangeLog fresh start 2009-10-14 15:06:41 +02:00
configure.ac build-sys: Require a new enough spice-protocol in .pc file 2015-08-26 11:01:09 +02:00
COPYING Relicense everything from GPL to LGPL 2.1+ 2010-04-13 22:22:15 +02:00
GNUmakefile Add a 'syntax-check' make target 2012-01-13 18:12:00 +02:00
maint.mk syntax-check: trailing whitespaces -- ignore binary files 2013-07-17 01:59:32 +03:00
Makefile.am client: Remove client code 2014-12-03 11:31:17 +01:00
NEWS Update NEWS 2014-05-19 11:35:14 +02:00
README Revise the spice client and server to use the new snd_codec functions in spice-common. 2014-01-02 12:34:34 +01:00
spice-server.pc.in build-sys: Require a new enough spice-protocol in .pc file 2015-08-26 11:01:09 +02:00
TODO.multiclient Remove trailing whitespace from end of lines 2012-01-13 18:11:59 +02:00

README 

   SPICE: Simple Protocol for Independent Computing Environments
   =============================================================

SPICE is a remote display system built for virtual environments which
allows you to view a computing 'desktop' environment not only on the
machine where it is running, but from anywhere on the Internet and
from a wide variety of machine architectures.

Installation
------------

The SPICE package uses GNU autotools, so the build install process
follows the standard process documented in the INSTALL file. As a
quick start you can do

  ./configure --prefix=/usr --sysconfdir=/etc \
        --localstatedir=/var --libdir=/usr/lib
  make
  sudo make install

Or to install into a private user specific location

  ./configure --prefix=$HOME/spice
  make
  make install

The following mandatory dependancies are required in order to
build SPICE

    Spice protocol >= 0.9.0
    Pixman         >= 0.17.7
    OpenSSL
    libjpeg
    zlib
    Cyrus-SASL

The following optional dependancies increase the available
functionality

    GE Gui         >= 0.6.0,  < 0.7.0   (GUI app support)
    OpenGL                              (GUI app support)
    Alsa                                (Linux support)
    XRandR         >= 1.2               (X11 support)
    Xinerama       >= 1.0               (X11 support)
    libcacard      >= 0.1.2             (Smartcard support)

Communication
-------------

To communicate with the development team, or to post patches
there is a technical mailing list:

   http://lists.freedesktop.org/mailman/listinfo/spice-devel

There is also a mailing list for new release announcements:

   http://lists.freedesktop.org/archives/spice-announce/

To view known bugs, or report new bugs, in SPICE visit

   https://bugs.freedesktop.org/describecomponents.cgi?product=Spice

Bugs found when using an OS distribution's binary packages should
be reported to the OS vendors' own bug tracker first.

The latest SPICE code can be found in GIT at:

   http://cgit.freedesktop.org/spice/

Licensing
---------

SPICE is provided under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

Please see the COPYING file for the complete LGPLv2+ license
terms, or visit <http://www.gnu.org/licenses/>.

Experimental Features
---------------------
To enable multiple client connections, set:
SPICE_DEBUG_ALLOW_MC=1

-- End of readme