Big problem (and doubts) with binding performance

Question

In a JavaFX mobile application I'm developing, I have a sequence of objects and a simple form with a text field and a list of items. The list of items must be populated with the sequence; as the user types in the text field, the list gets filtered properly.
This worked perfectly with some mock data (a handful of items), but it's really a disaster after I've tried to throw in real data (1000 - 2000 elements). I don't know whether it's a bug of JavaFX, a bug of mine, or if binding must not be perused. Before posting the code, there's some guideline I should be aware of, such as the max. feasible size of a sequence?
BTW, I must say that I'm not even able to get a JSON file through a parser, instantiating objects and adding them to a sequence. It's painfully slow and basically I can't even see its going on after about 100 elements.

Answer 1

Now, the relevant part of the controller.
package it.tidalwave.bluebillmfx.taxon.controller;
import javafx.animation.Timeline;
import javafx.animation.KeyFrame;
import it.tidalwave.bluebillmfx.taxon.model.Taxonomy;
import it.tidalwave.bluebillmfx.taxon.model.Taxon;
public class TaxonomyBrowsingScreenController
    public var selectedTaxon: Taxon;
    public var taxonomy: Taxonomy;
    public var filter: String = "";
    var leading = "";
    function matches (taxon : Taxon, string: String) : Boolean
        def m = (string == "") or taxon.displayName.toLowerCase().startsWith(string.toLowerCase());
        println("matches({taxon}, *{string}*) => {m}");
        return m;
    public var filteredSpecies = bind taxonomy.species[species|matches(species, filter)] on replace
        println("trigger begins");
        leading = commonRoot(filteredSpecies);
//        println("Selected {userInput} -> {filteredSpecies}");
        if ((leading != "") and (filter != leading))
            println("ROOT: {leading}");
        if (sizeof filteredSpecies == 1)
            selectedTaxon = filteredSpecies[0];
            println("SINGLE SELECTION {selectedTaxon}");
        else
            selectedTaxon = null;
        println("trigger ends");
  }Edited by: Fabrizio.Giudici on May 21, 2009 1:42 AM