Оптимизация сайта Битрикс для быстрой загрузки

<?if(!$USER->IsAdmin()):?>
      
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                  ym(КОД_СЧЕТЧИКА, "init", { clickmap:true, trackLinks:true, accurateTrackBounce:true, webvisor:true });
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<?if(CSite::InDir("/contacts/")):?>
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<div class="widget-cell" id="flamp-widget-cell" style="display:none;">
       <a class="flamp-widget" href="//krasnoyarsk.flamp.ru/firm/ХХХХХХ" data-flamp-widget-type="responsive-new" data-flamp-widget-id="985690699624139" data-flamp-widget-width="100%" data-flamp-widget-count="2">Отзывы о нас на Флампе</a>
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                         var js,fjs=d.getElementsByTagName(s)[0];
                         js=d.createElement(s);
                         js.async=1;js.src="//widget.flamp.ru/loader.js";
                         fjs.parentNode.insertBefore(js,fjs);
                         $('#flamp-widget-cell').show();
                     },200);            
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<img src="placeholder.png" content="realimg.png" class="lazyImg" alt="altImg" title="titleImg">

if($('.lazyImg').length>0){
   setTimeout(function(){   
      $('.lazyImg').each(function(i,el){
         var src = $(el).attr("content");
         if(typeof(src) != undefined){
            $(el).attr('src',src);
         }

      });
   },1500);
}

$(window).on('load',function(){
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        // добавляем скрипт
        var s=d.createElement('script');
        s.src='<?=SITE_TEMPLATE_PATH?>/js/jquery-ui.js';
        s.onload =function(){ 
            //иницилизируем после загрузки скрипта        
         var arParamsAutocomplete = <?=CUtil::PhpToJSObject($arJsParamsAutocomplete)?>;      
         for (var i = 0; i < arParamsAutocomplete.length; i++) {
            arAutocompl = arParamsAutocomplete[i];
            $( "#"+arAutocompl.id ).autocomplete({
               source: arAutocompl.source,
               select:function(event, ui) {
                  if((ui.item != null) && (typeof ui.item != undefined)){
                     if(ui.item.id != ""){
                        $("input[name='"+arAutocompl.inputName+"']").attr("checked","");
                        $('#'+ui.item.id).attr("checked","checked");               
                        smartFilter.selectDropDownItem($("label[for='"+ui.item.id+"']")[0], ui.item.id);
                     }
                  }                                             
               },
               change: function(event, ui) {                           
                  
                  if((ui.item != null) && (typeof ui.item != undefined)){
                     
                  }
                  else{
                     $("input[name='"+arAutocompl.inputName+"']").attr("checked","");         
                     $("#"+arAutocompl.all_values_input).attr("checked","checked");
                     smartFilter.selectDropDownItem($("label[for='"+arAutocompl.all_values_input+"']")[0], arAutocompl.all_values_input);                                       
                  }
               }

            });

         }
      };

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        var l=d.createElement('link');
        l.type="text/css"; l.rel="stylesheet";l.href='<?=SITE_TEMPLATE_PATH?>/css/jqueryui.custom.css';
        h=d.getElementsByTagName('head')[0];h.appendChild(l);
   },2000); 
});