[Qt-qml] memory use in javascript

[Malte Marquarding]

Hi,

I am using the following javascript function to decode xml data (for an 
XmlModel). This seems to allocate a lot of memory.
As per code comment I managed to reduce it by a lot already.
Is there anything obviously wrong?


  function lzdecode(instr) {
     var ecPos = instr.indexOf("<")-1
     var eC = instr.charAt(ecPos);
     var data = new String(instr.slice(ecPos+1));
     var outstr = new String();
     var p = 0;
     var l = 0;
     for (var n=0; n<data.length; n++) {
         // this code consume a lot of memory
         if (data.charAt(n) == eC) {
             p = data.charCodeAt(n+1)*114 + data.charCodeAt(n+2) - 1610;
             l = data.charCodeAt(n+3)-14;
             // cast to string otherwise we allocate heaps of memory???!
             outstr += String(outstr.substr(-p,l))
             n += 3;
         } else {
             // This doesn't
             outstr += data.charAt(n);
         }
     }
     return outstr;

Cheers,
Malte.