Slow Recalculation�s time

jexperts · October 9, 2015, 12:43pm

We have a project with about two thousand tasks sequenced by the network of predecessors

When there is a change at some date task is taking about 4 seconds to recalculate the new dates and this time increases exponentially when the number of tasks also increases from 2000 tasks.

Is there any way to reduce this recalculation’s time?

Muhammad.Waqas · October 11, 2015, 9:39pm

Hi,

We are sorry for a delayed response. We have analyzed your shared problem and were able to identify the delays you have mentioned. We are still testing this issue at our end with a number of other tests to compare the performance with the .NET equivalent of the API. The tests will be completed soon and once it is done, we shall share our feedback here with you.

Muhammad.Waqas · October 12, 2015, 10:24am

Hi,

We have analyzed the problem and compared the performance in .NET and Java platform. A sample project file is created with 3000 tasks with each task having predecessor. This file is opened using Aspose.Tasks for Java 8.8.0 and one of the tasks start date is modified. After this Reclaculate() function is called. It is observed that it takes about 40 seconds to complete this function.

This issue is logged in our issue tracking system for further investigation by the product team under id: TASKS-34240. I shall write here as soon as some feedback is received in this regard.

jexperts · June 20, 2016, 12:24pm

Some news about this issue? Or an alternative?

We need performative lib to work with our projects.

kashif.iqbal · June 20, 2016, 5:53pm

Hi,

Thank you for contacting Aspose support team again.

I have tested the scenario using Aspose.Tasks for Java 9.4.0 and observed that for a project having about 3000 tasks, a task date is changed and recalculate function is called. It just takes 2 seconds to execute Recalculate() function for this project file. Could you please give try to the following sample code using attached project file and share the feedback?

Project proj = new Project(path + “Output_3000.xml”);

Task task = proj.getRootTask().getChildren().getById(20);
SimpleDateFormat DF_DDMMYYYY_HHMM = new SimpleDateFormat(“dd/MM/yyyy HH:mm”);

try {

task.set(Tsk.START,
DF_DDMMYYYY_HHMM.parse(“01/01/2016
08:00”));

} catch (ParseException
e) {

e.printStackTrace();

}

/////////////////////////////////////////////////

System.out.println(new Timestamp(System.currentTimeMillis()) );

proj.recalculate();

System.out.println(new Timestamp(System.currentTimeMillis()));

proj.save(path + “Output_3000_Changed.xml”, SaveFileFormat.XML);