Does hobbes have any kind of db or persistence functionality? As a programming language, k/kdb is nice (and I personally prefer it to APL and J), but without the db part I suspect that it wouldn't have been as popular (in the niches that it is popular).

Seems like a mostly eager haskell; am I correct? How does it compare performance-wise to ghc? (It obviously does much better on embedding and interfacing C++)

Yes there are persisted data structures and databases built on top of them. The whole type system applies to persisted data structures so you can make your own data structures and fill out a few type class instances to query them with plain list comprehensions (e.g. btree indexes are defined and queried this way in some internal tools).

Eager Haskell with a structural type system, deterministic garbage collection, and no overloading penalty, that would be a fair summary.

It'd be interesting to see how GHC would do in the same area, there would be some significant challenges. I haven't tried to use GHC there so I can't say.

Interesting. So they're taking the "app engine" concept that Kdb provides and promoting that bit. Anyone have experience using Hobbes in the wild?

Scrolling through the thing: I'm pretty sure not many (possibly not any) people are going to have experience using this thing in the wild.

Except at Morgan Stanley (where the same could be said for kdb 20 years ago).

Well, do you know anyone at Morgan who is using it? I must say that I do not.

Five of his last eight posts contain links to it. So I surmise he is the primary author of it.

Yes I do.

Great! Glancing at it, I suspected it wasn't actually used; looked too "Buck Rogers," but maybe I am old and set in my ways.

Do you have a pointer to setting something like a ticker plant up like in the old K3 manuals? Maybe over here? https://hobbes.readthedocs.io/en/latest/logging/hog.html#on-...

Something about the language itself, the presentation and documentation, or the dependency environment?

BTW, it would be a treat to see an open sourcing of kerf at some point! I am an admirer.

I might be misinterpreting your message, but if not - Shakti is not made by Kx, which AW has been bought out of. Shakti is a new company (although AFAIK everyone there is ex-Kx)

They use hobbes mostly for high speed trade capture and limited querying.

KDB is still used extensively for less structured /performant examples.