Fix contract call fee issue

[MaksymZavershynskyi]

We have discovered that we were underpricing contract call fee due to a bug in param estimator tool that was hidden by a bug introduced in this PR: https://github.com/nearprotocol/nearcore/pull/2845/files#diff-a811f7fb6a4892a2b6cc0098f7f68616R567. It turns out 300KiB contracts would cost >100Tgas to compile which is prohibitively expensive for our partners. According to @willemneal this is not only a Wasmer issue, but Wasmtime+lightbeam have the same CPU cost.

We need to fix it urgently and delay Mainnet launch until we do so CC @SkidanovAlex , @bowenwang1996 Things that we need to do:

• @olonho or @evgenykuzyakov to independently double check @willemneal 's results that Wasmtime+lightbeam and Wasmer+singlepass produce almost exactly the same number of CPU instructions during compilation. This coincidence looks suspicious for two completely different backends with different architectures;
• @olonho, @willemneal, @evgenykuzyakov need to investigate whether there are low-hanging fruits in Wasmer+singlepass compilation. E.g. why does compilation cost so much, isn't it supposed to be JIT?
• @evgenykuzyakov should start working on implementing [Proposal] Differentiate cold and hot contracts NEPs#97 . Good news, this might boost our contract call TPS significantly overall.

[mikedotexe]

Please advise if this affects if/how we should communicate to launch partners when you have a free moment.

[evgenykuzyakov]

Please comment on near/NEPs#97 (comment)
Does this work?

[frol]

Consider testing the rewrite of wasmer (wasmer-reborn): https://github.com/wasmerio/wasmer-reborn

[bowenwang1996]

@frol looks like the repo doesn't exist

[frol]

It seems they had made it private again... Should we ask them to share it with us? 😃

[willemneal]

It seems risky to try a new VM that is less tested. We could revisit when it's stabilized.

[bowenwang1996]

@frol looks like it's already merged wasmerio/wasmer@518e0f3

[MaksymZavershynskyi]

Setting estimate to 5 -- how much time it is going to take in this cycle.

[stale]

This issue has been automatically marked as stale because it has not had recent activity in the last 2 months.
It will be closed in 7 days if no further activity occurs.
Thank you for your contributions.

[bowenwang1996]

Superseded by #4401