test(fast-usdc): count computrons for advancement

[samsiegart]

closes #10511

Testing

~/agoric-sdk/packages/boot$ SWINGSET_WORKER_TYPE=xsnap yarn test test/fast-usdc/

...

  ✔ makes usdc advance (5.5s)
    ℹ fusdc advance computrons (3 oracles) 46517841n

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View logs

[dckc]

ℹ fusdc advance computrons (3 oracles) 46517841n

46.5Mc is over 1/2 of the current 65Mc block budget. So no more than 1 per block, and that's if all the oracles report in 1 block.

My prototype measurement was 28.8Mc, but that was using a single oracle and who knows what other short-cuts.

[dckc]

if we want a measurement in every ci run, this doesn't seem to get us there yet

[dckc]

I was expecting this to get set to xsnap somewhere in ci, but I don't see it.

I'm not certain where the bar should be. hm.

[dckc]

nice work

based on discussion with @turadg , on-demand measurements suffice.