For the last few weeks, I've been working on a couple of patches to tcmalloc, Google's super high performance memory allocator. I'm going to post about them soon, but first I thought it would be cool to give some background about what a memory allocator actually does. So, if you've ever wondered what happens when you…
Previously in Jepsen , we discussed Riak . Now we’ll review and integrate our findings.
One of the big features for Go 1.1 is the new scheduler, contributed by Dmitry Vyukov. The new scheduler has given a dramatic increase in performance for parallel Go programs and with nothing better to do, I figured I'd write something about it.
Hey! This is a bit old! Things may have changed and I haven’t necessarily fixed them. Most computers can’t create true random numbers. They use a formula which makes a very long stream …
tl;dr: You can perform non-blocking multi-object atomic reads and writes across arbitrary data partitions via some simple multi-versioning and by storing metadata regarding related items.
Outside of initial page load problems, “layout thrashing” is the most common performance problem I see in dynamic web applications. This is particularly true for Single Page Applications which build and destroy views on the fly. However, I’m often amazed by the number of web developers I run into who are unaware of…
Posts and writings by Lennart Poettering
git , Single page HTML , Kindle .mobi , PDF , .epub , HTML for printing , book cover .
TLS is not slow, it's unoptimized. A hands-on tour of optimizing nginx to deliver one-RTT Time To First Byte (TTFB) with TLS.
A couple of years ago I wrote an article about the Curiously Recurring Template Pattern in C++ , focusing on the motivation behind it and how to implement it.
What is the most commonly used bytecode language in the world? Java (JVM Bytecode)? .NET (CLI)? Flash (AVM1/AVM2)? Nope. There’s a few that you use every day, simply by turning on your computer, or tablet, or even phone. You don’t even have to start an application or visit a webpage.
A guide on writing beautiful native libraries in C or C++ that compile to native code.
One of MRI's big performance problems is that method cache expiry is global. That is, any time you make a change to any class anywhere, the entire VM's method caches get busted at the same time. This is why you'll frequently hear people saying that "calling Object#extend is bad".
What if, instead of running a process-data program on this machine, we want to run it on another machine? No problem. We make a TCP connection to a process-data server on the remote machine. On the local machine, we have generate-data writing to the TCP connection, and consume-data reading from the TCP connection…
Real-Time Garbage Collection (RTGC) tests the limits of what we typically think is possible in production software. You might hear “Real-Time” and “Garbage Collection” together and think “If you truly need real-time guarantees, why would you use a garbage collected language?” or “How is real-time Garbage Collection…
A blog about computer science education. Projects, resources, and ideas for teaching, learning, and using computer science. By a teacher for teachers.
People often criticize asynchronous messaging solutions as too complicated and cumbersome
This blog post is the third of a series of posts dealing with the results of the Debian systemd survey . I intend to give a presentation at DebConf 2013, too, so you could either read my posts, or watch the talk, or both :-).
Attached Code: https://github.com/iainkfraser/cache_transpose Before we begin, the underlined words are briefly described in the gloss...
Last week, during Tomas ' keynote at MySQL Percona Live Conference in London we announced as one of "previews" of the following MySQL 5.7 release(s) -- an over 1,000,000 Query/sec result obtained with InnoDB Memcached plugin on a Read-Only workload. This article here is just to confirm the announced results without…
(This blog entry has been recovered for the sole purpose of repairing a link in Hackernews. This blog entry is otherwise hidden on the website. 2026-04-13)
