Hi! I put split.php into my sandbox (contributions/sandbox/chx/) which wraps every module-defined function call for all modules in m(). It's a bit rough, mkdir calls are missing, but for testing it's OK. Drop it into your Drupal installation directory, create files/modules and let it go. I have copied module_invoke and named it m() -- if someone needs, I can roll a patch ;) I have tried a little ab and I have measured about 3% percent of performance loss: Time per request: 5846.368 [ms] (mean) Time per request: 1169.274 [ms] (mean, across all concurrent requests) Time per request: 6033.208 [ms] (mean) Time per request: 1206.642 [ms] (mean, across all concurrent requests) However, I think it worths it. As some of you know, I am planning to introduce a "split" mode so only those functions are loaded which are called. This will surely cure memory limit problems. I do not yet know about peformance -- we'll have a lot of small .inc files which needs to be read instead of a few huges one, but the total amount of read is a lot smaller and the parsing will be lot less. We shall see. Second, if we want to, we can be _real_ modular after this: every function can be "overwritten" this way if we define say module_overwrites_originalfunctionname to be an overwrite of originalfunctionname and get module_invoke to the overwrite. If we think it does not worth it then it could be a contrib project after all.