PHP: is that why Facebook is struggling under the load

[marypcbuk]

I've been noticing that Facebook, particularly Facebook Lite, is struggling under the load these days. At least for me, Facebook often doesn't load (it will be the only one of my home page tabs that's missing in action). Now I don't know if that's going to get fixed by what might be an update to the PHP runtime or (more likely) a compiler, but if more than one in three of the Americans who are online start updating their status at least once a week (the latest stat I saw) I wonder if Facebook will need more fundamental architectural changes to cope...