Optimization option

Hello,

I'm currently building site and have noticed that my site is quite slow (average load time 400ms). So I was thinking of a ways to make it faster for anonymous user. I was unable to use normal caching because at least two modules (that is blocks they provide) ubercart and polls are not compatible or are less functional. One way to solve this problem is by using additional ajax request and fill block from there, but that seems to be a messy solution. So, I came to an idea, to do the same thing but without extra ajax request. Another idea was, that not every module is needed for rendering few blocks, so why should all be loaded.

Procedure can be described by these steps:
- enable normal caching
- each block (their html) has to marked by two unique comments (by slightly modifying block.tpl.php)
- in index.php some additional logic must be added:
* bootstrap drupal to DRUPAL_BOOTSTRAP_SESSION (a stage before late caching)
* stage DRUPAL_BOOTSTRAP_LATE_PAGE_CACHE have to be duplicated with exit statement removed
* if cached page exist then
- bootstrap stages DRUPAL_BOOTSTRAP_LANGUAGE and DRUPAL_BOOTSTRAP_PATH
- load and initialize ONLY needed modules (in my case i only needed to load 25% of modules to render poll and cart blocks)
- render needed blocks
- in cached page replace just rendered block using markers from first step
- print page and exit script
* if cache does not exist then complete bootstrapping let drupal complete request unmodified

I implemented this technique and got 50% speed boost (from 2.52 req/sec to 5.51 req/sec).

So, what do you think?

Regards,
Ales