Performance of ASP.Net when Umbraco is used

Hi Team,

I am planning to do the following config changes. Can someone explain the advantages and disadvantages for below config related

1. IIS7.5 does not show startMode property in advance settings but to setup the pool set the attribute startMode to AlwaysRunning of the IIS config file i.e., C:\Windows\System32\inetsrv\config\applicationHost.config:

<applicationPools>

    <add name="MyAppWorkerProcess" managedRuntimeVersion="v4.0" startMode="AlwaysRunning" />

</applicationPools>

2. Web.config level adding batch and optimizeCompilations

<system.web>

       <compilation debug="true" targetFramework="4.0" batch="false" optimizeCompilations="true" />

</system.web>