Comparison with Google Trillian

[domwoe]

Hi,
this is an interesting project!
Is there a comparison to Trillian anywhere?

[gdiazlo]

I'm sorry for the delay to answer this. We're glad you find QED interesting.

We don't have a detailed comparison. We have talked with the Trillian guys before implementing QED. The goals are different, and so are the approaches.

QED focuses on a high write performance on a single big tree, while remaining at comparable query performance. The storage engine is an important part of QED. It works standalone while Trillian relays on a third party database.

Also, QED uses a history tree (see the referred papers for deep details about this) which allows us to emit proofs of the order on which the events where inserted.

We haven't published our testing yet, but we will, showing performance indicators such writes/second, memory and storage usage, etc.