Add detailed timings of page creation
sometimes the nightlies pages (in particular build and test reports) are very slow and it's very difficult to understand where the problem comes from.
When we generate a page from the content of a remote zip file we should record how much time was spent getting the zip data over the network, how much we spent in the decompression and how much in the processing.
Instead of recording the the different bits by hand we could run requests through Python cProfile and give access to the profile dump from a parallel page to the one requested... or even use a special url that wraps the load of the normal page.