Archive

Comments

Post a Comment

Popular posts from this blog

Reflecting on CS Graduate Admissions

I was just indulging in my favorite bad habit (reading hacker news), when I came across a discussion about  prestige in faculty hiring  - namely, the fact that the majority of CS professors across the US come from the top 18 or so universities, and that even within that, there's bias.  The HN discussion turned to Ph.D. admissions, with a commenter noting: " I'm not sure, but I'd bet that the best institutions actually don't care where their applicants come from. They can afford to just choose the best. It's the so-so places that have to signal their quality by 'hiring the best'. I've seen this in graduate school applications - students with poor marks often stand a better chance of admittance in a top program than a so-so one. " I just finished chairing the CMU CS Ph.D. admissions committee, so I thought it might be worth writing down my experience in doing so.  With two very important notes: I'm not doing it next year, so please don...
Read more

Chili Crisp Showdown: Laoganma and Flybyjing

Image
I've been on a bit of a chili crisp mission lately.  The Internets -- and my friends -- appear convinced that the best chili crisp is Laoganma .  Or Flybyjing .  Certainly one of them.  But which? My answer, alas, is that you might want a bottle of each.  Or five bottles of each.  Let's jump in: Laoganma on the left, Flybyjing on the right.  The famous slightly disapproving face of the old grandmother stares at us, contrasted with the apparently very-hard-to-print rainbow label of the newer entrant.  Opening up the containers, one is immediately struck by the color and texture differences: Laoganma, on the left in both photos, has more "crunchy bits", but also has fewer suspended solids in the oil.  The bottle is about 3/4 full of the solid crispy bits.  The flybyjing bottle is only about 1/3 full of crispy bits. This difference flows through to the spoonfuls below -- much more crispy stuff in the laoganma, but its oil...
Read more

Moving the Pi Searcher from Go to Rust

Image
Seven years ago (almost to the date), I wrote about my experience moving the Pi Searcher from C++ to Go .  In that article, I mentioned that while the core searching code got slower, the system as a whole sped up by avoiding the per-request fork overhead of the earlier CGI-based code. This year I moved the Pi Searcher to Rust, hoping to get the best of both worlds.  The tl;dr is that it worked and gave me and end-to-end throughput increase of at least 22%.  But not entirely in the place I'd expected!  The code is basically a transliteration of the Go to Rust, except for moving from Go's internal net/http server to actix-web for Rust.  The algorithm is the same:  sequential search for short search strings, and using a suffix array for longer strings. Results Code length isn't too different.  I was a little sloppy in writing the Rust version, so I don't think a comparison is entirely fair, but they're within 50% of each other and would probably be ...
Read more