Re: Re: About optimization for compiler

Hey: On Fri, Feb 27, 2015 at 2:41 PM, reeze <reeze@php.net> wrote: > Hi, > > On 27 February 2015 at 14:26, Xinchen Hui <laruence@gmail.com> wrote: >> >> Hey: >> >> On Fri, Feb 27, 2015 at 2:22 PM, Xinchen Hui <laruence@gmail.com> wrote: >> > Hey Internals: >> > >> > I was looking Bob's switch optimization.. >> > >> > then I start to worry about where is the place optimization should >> > goes.. >> > >> > in generally, PHP is a interpreted language. IMO, it should >> > compiler the PHP codes to opcode without any optimization(of course, >> > we did some, but they won't change a lots of opcodes which should be >> > generated).. >> > >> > and, since 5.5, we already have opcache bundled in.. >> > >> > thus, I am proposing a principle, that is: >> > >> > in the future, we only do optimization in opcache side, and keep >> or maybe big optimization? but I don't know how to define "big" or >> "small" optimizations now.. >> >> (small is the optimizations, we are sure it is safe, maybe) >> >> thanks >> > Zend Compiler without any optimization... considering Zend Compiler do >> > things in -O0. >> > >> > since, optimization always are dangerous.. if we only do them in >> > opcache, user can still run them codes with disable opcache, or at >> > least disable some optimization level which cause that.. >> > >> > what do you think? > > > We may need to clarify which kind of optimizations we want to set a > principle. > There are different level's optimizations. > > Opcache is a opcode to opcode optimizer, but some optimizations might need > lower level > optimizations like Bob's, some might need to change base data structure. > > We have AST intermediate represent structure, there might be some AST level > optimizations, this not opcache's job too. maybe you misunderstand , but let me declare it again. that's what I proposed.. keep opcodes honestly represents what php codes is... (stop doing optimization for compiler for now, and introduces APIs for optimizations, then do them outside of Zend) thanks > >> >> > >> > thanks >> > >> > -- >> > Xinchen Hui >> > @Laruence >> > http://www.laruence.com/ >> >> >> >> -- >> Xinchen Hui >> @Laruence >> http://www.laruence.com/ >> >> -- >> PHP Internals - PHP Runtime Development Mailing List >> To unsubscribe, visit: http://www.php.net/unsub.php >> > > > > -- > Reeze Xia > http://reeze.cn -- Xinchen Hui @Laruence http://www.laruence.com/