Marcus Boerger wrote:
Aren't we able to bind these at least partially to the function call
opcode, in case we know they are constant? If all is constsnt we could
even store the whole lookup in the opcode. Well you'd have to convince
Zend to do that because os far they have always been against this
approach.
We can't modify opcode it self as it'll break opcode caches.
However we can introduce some indirect table associated with op_array,
which can be used to implement inline caches without direct opcode
modification (in the same way as IS_CV variables work). There are a lot
of papers about polymorphic inline caches (e.g.
http://research.sun.com/self/papers/pics.html) which we probably should
use to not to invite bicycle.
Thanks. Dmitry.
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