On 25-Jun-07, at 4:27 PM, naruto canada wrote:
Does gambit-c have call/ec? Thanks.
Call/ec is not predefined. You can define it yourself like this:
(define call/ec call/cc)
Obviously, in this case the implementation of call/ec is not as fast as it could be. On the other hand, Gambit's implementation of continuations is one of the most efficient. For example, on the ctak benchmark which uses call/cc extensively, Gambit is about 2 orders of magnitude faster than MzScheme. It would be interesting to see how MzScheme fairs when call/cc is replaced by call/ec in that benchmark (I can't run the test because my usual work machine is out of order). See http://www.iro.umontreal.ca/~gambit/bench.html for other benchmark results (fibc also uses continuations extensively).
Marc