Ah, makes sense that compilation of collections is part of the testing.
There have been multicore ARMs in SMP configurations. Maybe there's an option there, if someone wants to look into what's currently available and whether it's appropriate for the target platform.
Then there's builds distributed across network hosts, if Racket were adapted to do that (I was thinking of something more like "parallel make", with a shared FS). Hardware-wise, depending on the exact ARM target, you could have a big long power strip of GuruPlugs, or dev boards, or a 1U rack shelf with a row of target phones Velcro'd to it. :) Though that's then testing parallel builds rather than the normal way, unfortunately.
Maybe someone can find a brilliant way that Nokia, Google, or Apple would fund students and equipment, that happens to include getting Racket runtime or DrRacket on a phone somehow.
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