Yes, i realise it does more than _just_ a syntax check, but the user
observable effect is just the success or failure of syntax check :D
--Oliver
On Mar 7, 2009, at 12:51 PM, Boris Zbarsky wrote:
Oliver Hunt wrote:
If by "compilation" you mean you're (effectively) just doing a
syntax check then webkit is able to this, although it has a
reasonable cost associated with it
"Compilation" in this case is parsing and compilation to
SpiderMonkey bytecode. This does include syntax checks, of course,
but also an optimization pass (constant folding, some simple dead
expression elimination, that sort of thing) and produces the actual
object that can be executed (which is quite distinct from the
character array that is input to the compilation process).
This is not a trivial cost at the moment: it's about 10-20% of the
cost of loading and executing some of the large scripts out there
which have all sorts of function definitions but don't immediately
run all the code (e.g. the scripts loaded by gmail).
-Boris
