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New
The latest blog posts to take off on Hacker News. 4,390 posts.
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Build your own operating system
Ten years ago (around the year 2001) I wrote a simple x86 protected-mode OS just to find out how operating systems work. That was really gr...
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Rapid DHCP: Or, how do Macs get on the network so fast?
One of life's minor annoyances is having to wait on my devices to connect to the network after I wake them from sleep. All too often, I'll open the lid on my …
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What every programmer should know about time
This is a trade-off: you can't represent a leap second, and your time is guaranteed to go backwards. On the other hand, every day has exactly 86,400 seconds, and you don't need a table of all previous and future leap seconds in order to format Unix time as human-preferred hours-minutes-seconds.
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Things you (probably) didn't know about xargs
If you’ve spent any amount of time at a Unix command line you’ve probably already seen xargs . In case you haven’t, xargs is a command used to execute commands based on arguments from standard input.
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How to handle 1000s of concurrent users on a 360MB VPS
There has been some recent confusion about how much memory you need in a web server to handle a huge number of concurrent requests. I also made a performance claim on the STS list that got me an unusual number of private emails.
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On HTTP Load Testing
A lot of people seem to be talking about and performing load tests on HTTP servers, perhaps because there’s a lot more choice of servers these days.
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JSLinux - Technical Notes
In 2011 I wrote the initial version of JSLinux, the first PC/x86 emulator in Javascript running Linux. I reused parts of another of my emulators ( QEMU ) for the x86 helpers and the devices.
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Understanding the code inside Tornado, the asynchronous web server
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.
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Why linux doesn't have a "wheel" group
The wheel group is, perhaps, not widely used today, or is seen as “archaic” and irrelevant. Nothing could be further from the truth. The wheel group is a group which limits the number o…
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Smaller than Bloom filters
I've been looking at what would be needed in order to have a global view of CRLs in browsers. At the moment revocation has three problems: privacy (by asking the CA about the status of a certificate you're revealing to them what you're looking at), performance (OCSP checks take hundreds of milliseconds which adds up…
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The Linux perf command rocks
A summary of Linux profiling/monitoring tools
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OpenSSL memory use in Node.js
Last Thursday I went to the Joyent office for Node Office Hours — I wanted to talk to Isaac about running a private NPM registry .
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How The Kernel Manages Your Memory
After examining the virtual address layout of a process, we turn to the kernel and its mechanisms for managing user memory. Here is gonzo again: Linux processes are implemented in the kernel as insta
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OS X Isn't for Developers
Written pieces, talks, and other bits by Zach Holman.
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Goliath: Non-blocking, Ruby 1.9 Web Server
There are easily half a dozen of factors you need to consider when picking an app server: the choice of the VM, implementation model, performance and memory usage, driver and library availability, community support, and so forth. In other words, it is a complex set of requirements, and no one solution is likely to…