SharePoint 2010 Iterating through All the webs in the site

Sometimes we need to process all webs in a site collection, as you want to do some quick fixes in the web.

//Starting point
public void ProcessAllWeb(SPSite site)
{
    using (var web = site.RootWeb)
    {
        ProcessWebRecursive(web);
    }

}

//Recursive method
private static void ProcessWebRecursive(SPWeb web)
{
    //do some processing
    //web.Lists["listName"].ItemCount

    foreach (SPWeb subWeb in web.Webs)
    {
        using (subWeb)
        {
            ProcessWebRecursive(subWeb);            
        }
    }

}

The following code snippet shows the efficient way of processing all webs in the site collection:
public void ProcessAllWeb(SPSite site)
{
    string[] allWebUrls = site.AllWebs.Names;
    foreach (string webUrl in allWebUrls)
    {
        using (SPWeb web = site.OpenWeb(webUrl))
        {
            //process web
        }
    }
}