Archive


February 2023
10:  
Integer log10 in Rust and C

October 2020
17:  
No, C++ still isn't cutting it.

August 2020
26:  
Tolerating the Pandemic #4: The Ventilation Edition

June 2020
26:  
Tolerating the Pandemic #3

May 2020
24:  
Speeding up fuzzing rust with shared initialization
18:  
Moving the Pi Searcher from Go to Rust

April 2020
17:  
Updates on factors that will ease living with a coronavirus pandemic

March 2020
23:  
Tolerating two years of a pandemic in no easy (but some manageable) steps

September 2019
6:  
Crossing a Brdg

February 2019
26:  
Chili Crisp Showdown: Laoganma and Flybyjing

January 2017
11:  
Finding Bugs in TensorFlow with LibFuzzer

December 2016
31:  
Accelerating cryptocurrency Mining with Intel ISPC
28:  
Finances for recent CS Ph.Ds headed to academia
25:  
22 Months of Voice-Based Assistants
10:  
Nobody ever implements sort

September 2016
1:  
Finances for CS Ph.D. students

May 2016
23:  
Don't quit that programming career yet because of AI

April 2016
30:  
Indirect shellshock security scanning via other people's logfiles
27:  
Stealing Google's Coding Practices for Academia

March 2016
12:  
AlphaGo is a triumph for humanity

February 2016
6:  
Cleaning the Imagenet Dataset, collected notes

January 2016
19:  
Vegan sous-vide recipes #1
1:  
Masking the taste of Augmentin - with candy canes

October 2015
10:  
Comparing Prepaid Cell Plans - A Public Spreadsheet (Fi, Cricket, Republic, T-Mobile)

June 2015
20:  
Why my car cost more than taking Uber everywhere

March 2015
8:  
Reflecting on CS Graduate Admissions

August 2014
28:  
Minting Money with Monero ... and CPU vector intrinsics

March 2014
31:  
A Public Review of Cuckoo Cycle
21:  
Fast prime cluster search - or building a fast Riecoin miner (part 1)
12:  
Blockchain explorations: The Riecoin Miner Arms Race

January 2014
13:  
Gaining Momentum: Duplicate Detection in CUDA for better mining

December 2013
28:  
To Krugman: Finding the Intrinsic Value of Bitcoin
18:  
Scrypt mining changes incorporated into CudaMiner
16:  
Inside a better CUDA-based scrypt miner
11:  
Briefly profitable alt-coin mining on Amazon through better code

October 2013
24:  
Experience with ePaxos: Systems Research using Go

August 2013
31:  
Cheap baby monitor with Android and a Tenvis IP Cam

June 2013
8:  
You can't actually learn by osmosis while sleeping

May 2013
15:  
Improving the Pi Searcher's speed by moving from C++ to Go

April 2013
15:  
Mushroom lentil bourguignon [vegan, tasty]
2:  
Rank & Select for Systems Folks + our minor contribution to the area

March 2013
11:  
Optimistic Cuckoo Hashing for concurrent, read-intensive applications

February 2013
25:  
Caring about Causality - now in Cassandra
12:  
Teaching Distributed Systems in Go

January 2013
30:  
Two examples from the computer science review and publication process
25:  
On the Ph.D.

November 2012
30:  
Coming up at ALENEX 2013

August 2012
9:  
5 ways that self-driving cars will change our lives
2:  
Reflections on the tech of childbirth

July 2012
27:  
A CS Geek's Reflections on Childbirth
14:  
Slowly switching to blogger

December 2011
1:  
A brief response to "COPS and PNUTS"

February 2011
13:  
Lovely running in the bay area

September 2010
22:  
Newest FAWN Cluster Photos

May 2010
4:  
Notes from Google "Flash" talk at UCSD non-volatile memories workshop

March 2010
10:  
NSDI Paper - SplitScreen Virus Scanning

December 2008
2:  
Best espresso in Pittsburgh: 21st st coffee

September 2008
21:  
Four espressos not to miss in Seattle

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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...
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Chili Crisp Showdown: Laoganma and Flybyjing

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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...
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Moving the Pi Searcher from Go to Rust

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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 ...
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