At the moment, Amacx loads arc.arc unpleasantly slowly. And I don’t even have all of arc.arc included yet.

I imagine it’s probably because the compiler is slow. (What else could it be?)

And I imagine there’s a good chance the compiler is slow because as the compiler recursively works its way down into forms being compiled, I functionally extend the compilation context in a simplistic way:

    (def functional-extend (g nk nv)
      (fn (k)
        (if (is k nk) nv (g k))))

I hope I can use the Racket profiler, if I can propagate function names and/or function source locations from Arc to Racket.

At the moment a typical profile trace looks like:

                                    for-loop [72]                                          5.1%
                                    ??? [1]                                               38.9%
                                    ??? [12]                                              56.0%
     [12] 1456(30.9%)  104(2.2%)  ??? /Users/andrew/w/amacx/arc/runtime.rkt:409:9
                                    ??? [12]                                              56.0%
                                    ??? [1]                                               42.2%

Today I ran into a weird issue. I was running the Racket profiler in DrRacket, and it worked at first, but then started to hang. So I closed DrRacket and restarted it, deleted all my `compiled` directories, reverted my source code back to an earlier version… and it still hung.

So I don’t know why it worked at first or why it stopped working.