WASM execution without prior deployment about nearcore HOT 4 OPEN

Just to add an alternative which is not written down: ZK validation does not care as much about execution time as there's only a single (or a couple) machines actually doing the actual execution and giving a significant time for the validators to compile and execute the contracts only serves to increase latency of individual transactions, rather than throughput of the network.

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Validators can locally cache compiled contracts. Hopefully this will resolve most cases?

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Yeah that's right, for the foreseeable future even a stateless validator should have enough disk space to cache the executables. There will be an ugly drop in performance anytime we have a protocol upgrade that invalidates old compilation results.
But I would expect it to be fine anyway. Or at least I think we have bigger problems to worry about first. :P

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near/NEPs#481 (comment) contains some info about interpreter speed if we ever want to go down that route anyway

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