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The most popular blog posts about systems & performance on Hacker News. 85 posts.
By that I mean a delay between receiving movement data from the mouse device and rendering the on-screen cursor. The lag of a Mac OS X cursor is at least twice bigger than Windows’ cursor and yes, a human eye can surely notice that.
Introducing Mempodipper , an exploit for CVE-2012-0056. /proc/ pid /mem is an interface for reading and writing, directly, process memory by seeking around with the same addresses as the process's virtual memory space. In 2.6.39, the protections against unauthorized access to /proc/ pid /mem were deemed sufficient…
We know what Unix's future used to look like. It was designed by the research group at Bell Labs that built Unix and called ‘Plan 9 from Bell Labs’. [ 154 ] Plan 9 was an attempt to do Unix over again, better.
David Ungar is "an out-of-the-box thinker who enjoys the challenge of building computer software systems that work like magic and fit a user...
One of the changes in Apple’s release of iOS6 last week was a surprising new ability to cache POST responses.
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Update theres a more recent post that expands further on where to start optimizing specific queries, and of course if you want to dig into optimizing your infrastructure High Performance PostgreSQL is still a great read For many application developers their database is a black box. Data goes in, comes back out and in…
Many modern virtual machines include either a fast interpreter or a fast baseline compiler. A baseline compiler needs extra memory and is li...
Having spent a lot of the last few years worrying about the scalability of data-heavy applications like Rapportive , I have started to get the feeling that maybe we have all been “doing it wrong”. Maybe what we consider to be “state of the art” application architecture is actually holding us back.
Or, A Heterogeneous Supercomputer in Every Pocket In the twilight of Moore’s Law, the transitions to multicore processors, GPU computing, and HaaS cloud computing are not separate trends, bu…
I tried building FreeBSD AMIs for the 32-bit EC2 instance types the same way as I did the 64-bit instances — by defenestrating Windows AMIs — but there was a catch: They wouldn't boot. In fact, when I tried this six months ago, they not only didn't boot, but they didn't even produce any console output to help me…
When writing lock-free code in C or C++, one must often take special care to enforce correct memory ordering. Otherwise, surprising things can happen. Intel lists several such …
In the research field of compression, the usual goal is to achieve the best possible compression rate. The best known algorithms, however, are very slow, and sometimes impractical for real-world ap…
What’s better than programming a GPU with a high-level, Haskell-embedded DSL (domain-specific-language)? Well, perhaps writing portab...
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While delivering a training recently, I got a request to put together a JVM tuning cheat sheet. Given the 50+ parameters available on the ...
Updated March 13, 2012 at 10:43PM: I have a list of limitations and known bugs toward the end. Updated March 14, 2012 at 9:30PM: I’ll be on the VMware Community Roundtable podcast at 12:00PM …
LLVM is a complex piece of software. There are several paths one may take on the quest of understanding how it works, none of which is simple. I recently had to dig in some areas of LLVM I was not previously familiar with, and this article is one of the outcomes of this quest.
ZFS keeps winning over btrfs on many fronts. Here's a short list that explains exactly how.
That's likely all you need to do to install and make default GNU grep, which on my machine is a ~10x speedup over the grep that ships with Mac OS.
