dataProcessor - Asynchronous

Is there a way to send dataprocessor synchronously instead of the default asynchronous?

There is no native support for such functionality , something similar can be achieved only by code modifications

dhtmlxdtataprocessor.js , line 232
var a2=new dtmlXMLLoaderObject(this.afterUpdate,this,true);
can be changed to the
var a2=new dtmlXMLLoaderObject(this.afterUpdate,this,false);