Project Loom is one of the major “projects” in which Java is moved forward, alongside the perhaps better known projects Amber and Valhalla. It will bring “virtual” threads with low resource footprint and low cost of blocking to the Java plaform. Here is my annual advent season update, this time with a focus on…
An exhaustive hands-on guide for dealing with N+1 problem in database-backed Ruby or Rails applications that use Active Record and serve the GraphQL APIs
Towards an API for the real numbers, Boehm, PLDI’20 Last time out we saw that even in scientific computing applications built by experts, problems with floating point numbers are commonplace. …
Racket version 7.8 is now available from https://racket-lang.org/ Racket CS may become the default Racket implementation in the next release. With the improvements in this release, Racket CS provides all of the functionality of Racket BC (the curre...
This blog post uses MathJax to render mathematics. You need JavaScript enabled for MathJax to work.
Threat modeling is a risk based approach to cyber security requirements analysis.
Code says what it does. That’s important for the computer, because code is the way that we ask the computer to do something. It’s OK for humans, as long as we never have to modify or debug the code. As soon as we do, we have a problem. Fundamentally, debugging is an exercise in changing what a program does to match…
This blog site has been archived. Go to react.dev/blog to see the recent posts. Although React 17 doesn’t contain new features, it will provide support for a new version of the JSX transform. In this post, we will describe what it is and how to try it. What’s a JSX Transform? Browsers don’t understand JSX out of the…
I recently became intrigued by the concept of event sourcing as applied to back-end architecture, specifically a microservice-oriented approach. I have spent the last few years working predominantly on the front-end, and became enamored by the simplicity and elegance of this pattern as the backbone of front-end…
Computers and computer systems are build up from deterministic, comprehensible, building blocks. Their operations and behaviors can be understood and reasoned about. I relate my personal beliefs and mindset on this point, and explore some manifestations and ramifications of this philosophy.
The sole purpose of this blog is to host a single article..
Video lectureMutator, Allocator, CollectorMemory blockAllocator interfaceMemory alignmentMemory mappingFreeing the objectsBlocks reuseFirst-fit searchAssignmentsNext-fit searchBest-fit searchBlocks splittingBlocks coalescingExplicit Free-listSegregated-list searchOptimizing the storageCustom sbrkConclusion This is the…
To denote the subsequence of natural numbers 2, 3, ..., 12 without the pernicious three dots, four conventions are open to us
Any fool can write code that a computer can understand. Good programmers write code that humans can understand. — Martin Fowler
About two years ago, I wrote a quite complicated diff tool in Clojure. It was complicated enough that I struggled to fit the algorithm in my head and the inputs were large enough that I had to make some efforts to improve performance.
This is a quick writeup of a steganographic tool that I threw together: steg86 . It uses a quirk of the x86 instruction encoding format to hide messages in pre-existing binaries with no size or performance overhead.
Gavin Sherry and I have presented several versions of a tutorial introduction on how to modify the PostgreSQL source code. The original version was given at the PostgreSQL Anniversary Summit in June of 2006. Gavin has since given a revised version of the talk (at LCA 2007), as have I (at PgCon 2007).
An appropriately annoying strategy for dealing with wiki rot at a company.
In Windows 10 version 2004, we are introducing the concept of Hosted Apps to the Windows App Model. Hosted apps are registered as independent apps on Windows, but require a host process in order to run. An example would be a script file which requires its host (eg: Powershell or Python) to be installed. By
How inappropriate data access patterns massively slow down programs and how the same problems arise with RESTful APIs.
26 April 2018 by Phillip Johnston • Last updated 10 June 2021You may call them guidelines, heuristics, or rules of thumb. No matter, the purpose is the same: to provide a reasonable approximation of the truth. These rules of thumb can help guide your understanding of the systems you work on, focus you toward the ……
Late last year I released posuto, a package presenting Japanese postal code data in an easy-to-use format. It's based on data released by Japan Post, which is infamous for being widely used but hard to parse.
This article gives a simple introduction with examples to recursive queries in PostgreSQL. It also includes a comparison to Oracle recursive queries.
Back with a post after 6 years of silence. If you had to parse a microsecond-resolution epoch timestamp as quickly as possible, how would you do it? We’ll take a look at using compiler intrinsics to do it in log(n) time.
