Make trie-cache resettable from backend

[skunert]

I have some benchmarks in cumulus where I want to reset the trie cache in between runs.

[bkchr]

In general, can you not just recreate the backend? As we do in the Substrate based benchmarks. Then you don't need this function.

[skunert]

In general, can you not just recreate the backend? As we do in the Substrate based benchmarks. Then you don't need this function.

You mean like here?

substrate/client/db/benches/state_access.rs

Line 212 in da604f1

let backend = create_backend(config, &path);

The substrate benchmarks reset the backend once for each benchmark. For my purposes I want to reset per iteration, so I would need to create a whole new client (not only backend) for each iteration. Being able to reset the trie cache seemed like the more elegant option here. But if you prefer I can look into that.

[bkchr]

Yeah, let's do it this way.

Not ultra great, but I also don't see any better way for now.

[melekes]

👍

[skunert]

bot merge

[paritytech-processbot]

Waiting for commit status.

[paritytech-processbot]

Merge cancelled due to error. Error: Statuses failed for efaeb51