spike: compare performance of sw-cache vs persistent helia blockstore

[SgtPooki]

We need to check if disabling sw-cache for block requests is more efficient when we use a persistance blockstore.

we likely do not want both sw-cache for block requests and persistent blockstore because it's just duplicating storage, but finding an optimal storage solution here could be good.

Questions:

1. how long until browser clears sw request cache if user doesn't clear it

[SgtPooki]

Items in a Cache do not get updated unless explicitly requested; they don't expire unless deleted. - https://developer.mozilla.org/en-US/docs/Web/API/Cache