/**
* Reads the parameters files and system settings to retreive the actual performance parameters.
* It updates the "actualParameters" according to the configuration loaded.
*
* @return the actual performance parameters, loaded by this method
*/
static synchronized PerformanceParameters loadConfiguration() {
Config configuration = Config.instance().load();
Preferences preferences = configuration.preferences();
PerformanceParameters actualParameters = new PerformanceParameters();
VMParameters netBeansVmParameters = VMParameters.load();
actualParameters.setVMParameters(netBeansVmParameters.toString());
actualParameters.setCachePath(SystemUtils.getCacheDir().toPath());
final int defaultNbThreads = JavaSystemInfos.getInstance().getNbCPUs();
actualParameters.setNbThreads(preferences.getInt(PROPERTY_JAI_PARALLELISM, defaultNbThreads));
actualParameters.setDefaultTileSize(preferences.getInt(PROPERTY_DEFAULT_TILE_SIZE, 0));
actualParameters.setCacheSize(preferences.getInt(PROPERTY_JAI_CACHE_SIZE, 0));
return actualParameters;
}