SPTK 3.2.2 is out.

["Alexey Parshin" <alexeyp@gmail.com>]

Dear SPTK user,

SPTK team proudly presents a new generation of SPTK, built all around XML.
You can download version 3.2.2 as *nix tarball
<http://sptk.tts-sf.com/sptk-3.2.2.tbz2> and Windows zip
<http://sptk.tts-sf.com/sptk-3.2.2.zip>.

This version of SPTK introduces a new approach to the data transfer within
SPTK and outside, based on XML. Therefore, the XML parser and storage were
revoked to work faster and use less memory.

Here are the compare results for SPTK versions 3.1 and 3.2. The tests were
conducted using examples/xml/xml_test2.cpp. The Windows machine used 2GB of
RAM and 3.2GHz Intel processor. The compiler used was VC++ 6. The Linux
machine used 512MB of RAM and Dual Core 1.83GHz processor. The compiler was
gcc 4.1.1. The test creates 500K nodes, writes them to the file, reads them
from the file.
Operation  SPTK 3.1, Windows  SPTK 3.2.2, Windows  SPTK 3.1, Linux  SPTK
3.2.2, Linux  Create 500K nodes 18.17 sec  2.02 sec  12.08 sec  0.69
sec  Save 500K nodes to buffer
19.12 sec  18.81 sec  2.21 sec  2.05 sec   Load 500K nodes from buffer
36.08sec
18.45 sec  16.36 sec  5.15 sec   sizeof(CXmlNode)  80  20  60  20   Memory
allocated for 500K nodes  202.4 Mb  87.7 MB  57 Mb  33 Mb
As you can clearly see, the speed up and memory use change are pretty
significant. The bad news - the CXmlNode API has changed. The access to
subnodes and attributes used to be done by using childNodes() and
attributes() methodes. Now it is done by using the node itself as a vector
of subnodes, and attributes is simply a public variable in CXmlNode class,
not a method.

The methods used to achieve these performance changes are also interesting.
Nodes now are not losing space for the data they can't use. For instance,
CXmlElement can't have a value, and CXmlText can't have subnodes,
attributes, or name. Attributes still use map, but it's only allocated if
the element has any attributes.

The changes in GUI components include the XML connectors save() and load()
for the CControl-derived components, CGroup and CScroll. This allows to save
and load windows or groups into/from XML files. It's really useful for
storing the program state, or the state of settings window, for instance.
Alexey Parshin,
http://www.sptk.net