Hey look, it's my first official MacOS app on the @AppStore.

apps.apple.com/us/app/fof/id1…
WTF is this you may ask?

Fair question.

It scratched a *very* small & *very* specific itch we^H^H I had at @twitter.
Over the last few years the #TwitterVMTeam has been using machine learning to automatically tune application JVMs:

youtube.com/watch?v=MODume…
A challenge in doing a demo of this work is creating an application w/ multiple parameters influencing performance in deterministic ways.
In order to model multiple functions in code with interesting and varying outputs for different input ranges...
...a developer would have to do a lot of math and have an intuitive sense of what function would produce what output.
Personally I find it easier to work backwards from the desired output by drawing the expected graph of output for input X...
...and then generating a function that interpolates between recorded points on the graph for the value of Y for any given X.
So that's what this app does: you draw a graph and then generate code in Java, Python, Scala, or JavaScript...
...for a function that will model the drawn curve with reasonable fidelity.
Ian Brown @igb
This makes it easy to add deterministic and programmable functionality to an application, demo, or test.
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Anyway, in the unlikely event you have the same problem, this app might help you out. If you do find it useful let me know!