Optimising saving to an sqlite DB? - sql

Question

I have an as3 app which utilises an sqlite db to save metrics data. It is well known that as3 is single threaded, so when I save to this db, the Stage Video I am playing becomes jumpy! I have heard that saving db data in batches can speed up this process so I save in a loop:
for (var i:int=0; i < metricsObject.metricsComponentData.length; i++){
switch (metricsObject.metricsComponentData[i].mouseType) {
case MetricsCollator.MOUSE_OVER:
this._query_txt = "INSERT INTO " + this._tablePath[0] + " VALUES (null, " + this._sessionID +
", " + metricsObject.metricsComponentData[i].timeStamp +
", '" + metricsObject.metricsComponentData[i].component + "'" + ")";
break;
case MetricsCollator.MOUSE_OUT:
this._query_txt = "INSERT INTO " + this._tablePath[1] + " VALUES (null, " + this._sessionID +
", " + metricsObject.metricsComponentData[i].timeStamp +
", '" + metricsObject.metricsComponentData[i].component + "'" + ")";
break;
} // end switch
executeQuery(this._query_txt);
} // end loop
I have looked into pseudo threading examples but they all require a sprite or stage instance, the class I am executing this code in, is not a display class, I don't really want to pass an instance of the stage into this class, seems dirty! ;-)
Anyone have any ideas?

Answer 1

Most examples of pseudo threading use a display object and an enter frame listener, but you can just as well use a Timer, or if your application has some kind of update loop that works too.
Here's a simple example using a Timer:
package {
import flash.display.Sprite;
import flash.events.TimerEvent;
import flash.utils.Timer;
public class PseudoThreadExample extends Sprite {
private var _timer:Timer;
public function PseudoThreadExample(){
// create a timer that runs with a low interval
// tweak this to fit your needs!
_timer = new Timer(30, 0);
_timer.addEventListener(TimerEvent.TIMER, handleTick);
}
public function startWorking():void {
// put work to be done in list here
// in your case that will probably mean making an array of SQL-
// statements to run later
_timer.start();
}
public function handleTick(event:TimerEvent):void {
// pop a thing off the list and do it.
// if list is empty, stop the timer
_timer.stop();
}
}
}