I don't think it's really fair to condemn all of asynchronous due to the slowness of QDI. There are faster ways of doing things like GaSP, dual rail domino done detection, bundled data, one sided handshaking, etc.
You're right, and I don't intend to condemn all of async, or even QDI for that matter :) I am doing my PhD on it, so I do think there is promise. I just think that arithmetic is better handled by Bundled-data specifically. Let QDI do the control leg-work and tack high-performance arithmetic to it.
Also, Gasp is certainly faster, but is limited to simple pipelines. That's why I like QDI, it lets me make weird circuits.
EDIT: Sorry, I got mixed up between the conversation threads... dislexia is a thing.
I'm not saying condemn async or QDI, but we must recognize what it is good at and what it is not. A QDI pipeline stage may be slower, yes. So don't use it if you just want to implement a linear pipeline. But do use it if you have a complex network because of the previously mentioned benefits. Gasp and other async pipeline topologies don't have the flexibility of QDI, and there isn't really a good framework to mix them with QDI techniques at the moment (maybe relative timing?). The power of async comes from this flexibility and the ability to avoid unnecessary computation.
