Speed advise using metadata plugin

Speed advise using metadata plugin

Hello,

I'm using jQuery 1.4.2 and metadata plugin (latest versión) to iterate over 3000 elements. The elements ar TRs of tables, and I need to show or hide them following some rules. This is a typical element I need to show or hide:

  1. <tr dim="{ta_1,en_G,re_V,se_3,tsk}" id_col="GVNSEG_WINNAT_NOM" style="display: none;">

When I need to show a group of elements, I made the following:

  1. var selectorSeccionesActivadas += '[dim*=se_3],[dim*=se_5],[dim*=se_6],[dim*=se_9]'; // This is runtime generated

    var tabCache = $(tabCacheGet(tabNumActual));
  2. tabTempShow = $(tabCache).filter('[dim*=en_'+goEnv+'][dim*=re_'+goRed+']'+hiddenSelector+',' +

  3.        '[dim*=en_G][dim*=re_G]'+hiddenSelector+',' +
           '[dim*=en_'+goEnv+'][dim*=re_G]'+hiddenSelector+',' +
           '[dim*=en_G][dim*=re_'+goRed+']'+hiddenSelector


          ).filter( selectorSeccionesActivadas).filter(':not([dim*=adv])').show();

The filter to hide elements is similar to that one. As you can see, I save to cache the filter of the first parameter of the "dim" selector:

  1. function tabCacheGet(tabNum) {
     if ( cacheTab[tabNum] != null) {
      return cacheTab[tabNum];
     } else {
      return cacheTab[tabNum] = $(trCacheGet()).filter('[dim*=

    ta_'+tabNum+',]');
     }
    }






So when I need to show a set of elements, I run on the cached "ta" parameter, and then I filter the next parameters. What I found is that Firefox runs this very-fast (almost real-time), but IE7 is slower, showing up the "this script is taking up too much time. Do you want to stop it?" message. Do you guys know a way of speeding up this

The metadata plugin expresion I'm using was copied from some example found on the net (perhaps on the plugin homepage):

  1. <script type="text/javascript" src="comun/jquery.metadata.js" ></script>
  2. <script type="text/javascript">

    jQuery.extend(jQuery.expr[':'], {
     meta: "!m[3]||((p=m[3].split('='))&&(p.length>1?$(a).metadata()[p[0]]==p[1]:$(a).metadata()[p[0]]))"
    });
    </script>



Thanks a lot in advance,

Luis Miguel