Hi, I have created the tabbed opportunity page and used it to override the "view" button, but it takes more than 15 seconds to open an opportunity.

Same happening to one of my custom object. I used a VF page to override the view button, and it takes long time to load.

When I reset the override, the normal pagelout can be loaded very fast(within 2-3 seconds).

What could be the reason? I have a lot of conditional render in my page, eg:

<apex:tab label="Approval History" name="Approval History" id="tabapprovalhis" rendered="{!$Profile.Id='00e00000xxx'||$Profile.Id='00e000000xxx'||$Profile.Id='00e0000xxx'||$Profile.Id='00e0xx'||$Profile.Id='00exxx'||$Profile.Id='00e000xxx'||$Profile.Id='00e0000xxx'||$Profile.Id='00e00xxx'||$Profile.Id='00e00xxx'||$Profile.Id='00e00xxxx'||$Profile.Id='00e00xx'||$Profile.Id='00exx'||$Profile.Id='00e00000xxx'||$Profile.Id='00e000xxx'}" > <apex:relatedList subject="{!opportunity}" list="ProcessSteps" /> </apex:tab> Page for custom object: <apex:outputText value="PS " style="font-weight:bold" rendered="{!not(isnull(LOA_Approval__c.PS_proposed_price__c))}" /> <apex:outputField value="{!LOA_Approval__c.payment_on_PO_ps__c}" rendered="{!not(isnull(LOA_Approval__c.PS_proposed_price__c))}" /> <apex:outputField value="{!LOA_Approval__c.payment_on_Delivery_ps__c}" rendered="{!not(isnull(LOA_Approval__c.PS_proposed_price__c))}" /> <apex:outputField value="{!LOA_Approval__c.payment_on_Installation_Complete_ps__c}" rendered="{!not(isnull(LOA_Approval__c.PS_proposed_price__c))}" /> <apex:outputField value="{!LOA_Approval__c.payment_on_Product_Acceptance_ps__c}" rendered="{!not(isnull(LOA_Approval__c.PS_proposed_price__c))}" />

 What is the best way to optimize the load speed?

Thanks