Using Elevated Privileges efficiently

Utility methods:

public static SPUserToken GetSystemToken(SPSite site)
{
bool cade = SPSecurity.CatchAccessDeniedException;
SPSecurity.CatchAccessDeniedException = false;
SPUserToken token = null;
try
{
token = site.SystemAccount.UserToken;
}
catch (UnauthorizedAccessException)
{
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPSite elevatedSite = new SPSite(site.ID))
{
token = elevatedSite.SystemAccount.UserToken;
}
});
}
finally
{
SPSecurity.CatchAccessDeniedException = cade;
}
return token;
}

public static SPUserToken GetUserToken(SPSite site, SPWeb web, string userLoginName)
{
bool cade = SPSecurity.CatchAccessDeniedException;
SPSecurity.CatchAccessDeniedException = false;
SPUserToken token = null;
try
{
token = web.GetUserToken(userLoginName);
}
catch (UnauthorizedAccessException)
{
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPSite elevatedSite = new SPSite(site.ID))
{
using (SPWeb elevatedWeb = elevatedSite.OpenWeb(web.ID))
{
token = elevatedWeb.GetUserToken(userLoginName);
}
}
});
}
finally
{
SPSecurity.CatchAccessDeniedException = cade;
}
return token;
}

Using the above methods:

SPSite contextSite  = SPContext.Current.Site;
SPWeb contextWeb = SPContext.Current.Web;
SPUserToken authorUserToken = Utility.GetUserToken(contextSite, contextWeb, hfAuthorLoginName.Value);
using (SPSite elevatedSite = new SPSite(contextSite.ID, authorUserToken))
{
     using (SPWeb elevatedWeb = elevatedSite.OpenWeb(contextWeb.ID))
     {    }
}