Re: RFC: Traits for PHP

Hello Rasmus, Tuesday, February 19, 2008, 2:45:15 AM, you wrote: > Larry Garfield wrote: >> You also note that this mechanism has no runtime impact. That's unfortunate, >> because I'd find the ability to add methods to an object at runtime >> conditionally based on some other value far more useful in my work. :-) >> Especially since, as above, there seems to be a way to implement this >> functionality now as-is with a little more typing, yet runtime modification >> is still impossible without eval() and similar scary stuff. > The idea here is that we want to be able to cache opcodes, classes and > functions and optimize them out of the runtime context so the executor > can skip creating classes and functions on every single request. A lot > of the traffic on this list over the past couple of months seems to > ignore this basic premise. Features such as autoload and runtime object > manipulation incur a huge performance hit in the sense that they change > something that was free before and not only add the cost of the feature > itself, but it also means the object in question now can no longer be > cached and has to be created on every single request. > This doesn't mean we can't consider such features, but people need to > also consider the performance implications. For that reason allowing traits in favor of include inside a class body is much better. Best regards, Marcus