Just started to play around with Appcelerator platform. My goal is to create a Android game using this platform.
To see how it is performing I did set up a simple task:
-Generate a map consisting of 1000 png images

Surprisingly this task takes like forever (~45 sec) on my Samsung Galaxy S
I compared doing exactly the same task in a webview. Jquery gets the job done in 800msec!

Am I doing something wrong, or should the platform not be used for applications with rich graphics?
Looks like the best option is to stick to the webview/jquery approach. (Some would say running Titanium in Phonegap-mode!)

Source, Titanium.UI.ImageView:

var win = Titanium.UI.currentWindow;
win.orientationModes = [
    Titanium.UI.LANDSCAPE_LEFT
];

win.addEventListener("open", function(e) {
    var startTime = new Date().getTime();
    Ti.API.debug("Generating tiles using Titanium.UI.ImageView...");
    var rows = [];
    for (i = 0; i < 20; i++) {
        var row = [];
        for (j = 0; j < 50; j++) {
            row.push(randomTile());
        }
        rows.push(row);
    }

    for (y = 0; y < rows.length; y++) {
        for (x = 0; x < rows[y].length; x++) {
            var img = Ti.UI.createImageView();
            img.image = "images/" + rows[y][x];
            img.top = y * 32;
            img.left = x * 32;
            win.add(img);
        }
    }
    var endTime = new Date().getTime();
    Ti.API.debug(endTime - startTime);
});


function randomTile() {
    var rnd = Math.random() * 3;
    if (rnd <= 1)
        return "tile-grass-01.png";
    if (rnd <= 2)
        return "tile-sand-01.png";
    if (rnd <= 3)
        return "tile-water-01.png";
}

Source, webview/jquery:

    $(function() {
        var startTime = new Date().getTime();
        Ti.API.debug("Generating tiles using jquery...");
        var rows = [];
        for (i = 0; i < 20; i++) {
            var row = [];
            for (j = 0; j < 50; j++) {
                row.push(randomTile());
            }
            rows.push(row);
        }

        for (y = 0; y < rows.length; y++) {
            for (x = 0; x < rows[y].length; x++) {
                var img = $(document.createElement("img")).attr("src", "images/" + rows[y][x]);
                img.css({ position: "absolute", top: y * 32, left: x * 32 });
                $(document.body).append(img);
            }
        }
        var endTime = new Date().getTime();
        Ti.API.debug(endTime - startTime);
    });

    function randomTile() {
        var rnd = Math.random() * 3;
        if (rnd <= 1)
            return "tile-grass-01.png";
        if (rnd <= 2)
            return "tile-sand-01.png";
        if (rnd <= 3)
            return "tile-water-01.png";
    }