iiinova — where your digital self keeps evolving

Dan Wallach

@dwallach.discuss.systems.ap.brid.gy

AI Security Resident, RAND Center for AI, Security, and Technology (CAST); Professor Emeritus, Rice University, Department of Computer Science 🌉 bridged from ⁂ discuss.systems/@dwallach, follow @ap.brid.gy to interact

Posts Replies Media

Dan Wallach @dwallach.discuss.systems.ap.brid.gy · 07/03/2026

I've recently been playing around with vibe coding some basic tree-like data structures (treaps, red-black trees, AVL trees, and hash-array mapped tries) in Rust, and then twisting the arm of the LLM to do an optimization from Sarnak and Tarjan (1986) that […] [Original post on discuss.systems]

Line chart showing nine different algorithms. Both axes are logarithmic, and the performance per operation is trending downward (which is to be expected) for every algorithm. The fastest algorithm, "IM HashMap" is the HashMap from the "im_rc" crate, which is ostensibly the same algorithm as the "HAMT" line, but actually is a good bit faster.

010

Dan Wallach @dwallach.discuss.systems.ap.brid.gy · 02/03/2026

I gave a keynote talk last week at NDSS. I spent the front half talking about memory safety and how we can, once and for all, eliminate things like buffer overflows. In the back half, I talked about how DARPA works, saying all the things that I wish I'd known […] [Original post on discuss.systems]

120

Dan Wallach @dwallach.discuss.systems.ap.brid.gy · 29/12/2024

Coffee nerding: decaf edition. Coffee YouTuber James Hoffman organized a cool thing: he bought several tons of a specific single origin bean and then divided it four ways. Three went to different decaffeination plants, one normal as a control. Then they […] [Original post on discuss.systems]

010

Dan Wallach @dwallach.discuss.systems.ap.brid.gy · 25/12/2024

Meanwhile, at Casa Wallach.

An orange striped cat, stretched out and snoozing on his arms, on a blue striped beach towel, over my legs.

020