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Description of bug

We discovered in autonomys/subspace#307 that sync on Windows is extremely slow. I did some initial testing and discovered that every runtime API call on Windows takes ~5ms, resulting in sync speed of under 20 blocks/s with our chain, while under Linux I can sync with 500 blocks/s speed.

Not sure what the root cause is yet, but it is a UX issue for our chain and it seems to originate from Substrate, hence this issue.

UPD: With native runtime sync on Windows increases to ~350 blocks/s, runtime call cost vanished.

Steps to reproduce

https://github.com/subspace/subspace/blob/main/docs/farming.md can be used to run pre-built Windows binaries of our chain and see sync speed, it also has instructions for building from source in case you want to add instrumentation and recompile. I guess building any other chain for Windows will result in similar sync slowness.