Any idea how Elerea compares to Grapefruit? It's great to see a lot of
competition in the FRP arena, but I hope in the end this results in a really
usable and scalable FRP system for Haskell :-)
2009/4/11 Patai Gergely
An other interesting approach to FRP is frtime (in Scheme): http://www.cs.brown.edu/~sk/Publications/Papers/Published/ck-frtime/ There should be a second paper than this one, I have just forget its reference. Elerea is a bit similar, since it also maintains the connections between signals explicitly. However, its evaluation is a backward chaining process starting from the top-level signal, only affecting the nodes it depends on transitively. Only stateful signals need to be mutated and reevaluated whenever the top level is sampled (to avoid time and space leaks). Constants, pure functions and function application nodes always stay the same, and they are lazily evaluated. Peripheral bound external signals are also static from the point of view of the evaluator, and it is the responsibility of the environment to update them.
Gergely
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