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Adventures in the land of substrings and RegExps
Few weeks ago a bug was filed against Dart SDK citing "very low performance of String.substring " . Here is a core of microbenchmark developer submitted together with the issue:
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 2,307 posts.
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Why I run my business like an open source project (2013)
When I first started consulting, I used to squirrel away in my corner and code. Some weeks later, I’d deliver my perfect shining gem to the client after, quite frankly, trying to talk to them as little as possible throughout most of the process. It wasn’t that I didn’t like people, I especially enjoyed talking with…
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“American Scientist” Understands Nothing about the Traveling Salesman Problem
I like to think there are some solid foundations to my life. I will be able to do the Monday New York Times crossword and I will not be able to do the Thursday version. My dental hygienist will not be satisfied with the amount of flossing I do. I will get my favorite spaghetti meal served on my birthday.
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AI is always less impressive than is claimed
プログラミングでは開発言語を用いて、アプリやWebサービス、業務システムなどを動かす仕組みを作ります。 将来プログラマーとして働きたいなら、まずは開発言語の基本から理解し、手を動かしながら学ぶことが近道です。 本サイトでは、初心者がつまずきやすい点を先回りして解消しつつ、焦らず段階的にスキルを積み上げる学習手順、職業訓練校の活用方法、復習や制作のコツまで具体的に整理して紹介します。
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Falsehoods programmers believe about time and time zones
Every day has 24 hours
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Magic Leap – Separating Magic and Reality
The Goal – Explain What is Magic Leap Doing Magic Leap has a way of talking about what they hope to do someday and not necessarily what they can do anytime soon. Their patent applications ar…
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People in Silicon Valley Don’t Click on Ads
At least, not according to Facebook data
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Where's my petabyte disk drive?
Fourteen years ago I noted that disk drives were growing so fast I couldn’t fill them up. Between 1997 and 2002, storage capacity doubled every year, allowing me to replace a 3 gigabyte drive with a new 120 gigabyte model. I wrote:
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ODROID-C2 Compared to Raspberry Pi 3 and Orange Pi Plus
tl;dr: The ODROID-C2 is a very solid competitor to the Raspberry Pi model 3 B, and is anywhere from 2-10x faster than the Pi 3, depending on the operation. The software and community support is nowhere near what you get with the Raspberry Pi, but it's the best I've seen of all the Raspberry Pi clones I've tried. The…
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Stealing Facebook access_tokens using CSRF in device login flow
I enjoy breaking websites.
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Windows 10 “Developer Mode”
The new Windows 10 update coming in a few weeks. It's called Windows 10 ...
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How to Write a Video Player in Less Than 1000 Lines
ffmpeg is a wonderful library for creating video applications or even general purpose utilities. ffmpeg takes care of all the hard work of video processing by doing all the decoding, encoding, muxing and demuxing for you. This can make media applications much simpler to write. It's simple, written in C, fast, and can…
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“Why do you work in security instead of something more lasting?”
This post grew out of a friend on Facebook asking (I paraphrase) "why do you spend your time on security instead of using your brainpower f...
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Malware in the browser: how you might get hacked by a Chrome extension
A case study of a Chrome extension that turned out to be some nasty botnet malware.
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The meeting that showed me the truth about VCs
I had a meeting with a well-known startup investor yesterday. The talk somehow pivoted from my seed-seeking startup into talking about the…
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The Monad Challenges: Jump start your understanding of monads
There are still some rough edges here, and also a fair amount of content to be added. But if we waited until everything was polished before publishing, it would probably never happen. So feel free to make comments, suggestions, or contribute new content. As always, pull requests are the most desirable.
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Switching Costs in Software Development
The story of why it is important to make sure that it is easy to switch from one service to another.
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Prime After Prime
Are the prime numbers sprinkled randomly along the number line, like windblown seeds? Of course not: Primality is not a matter of chance but a product of simple arithmetic. A number is prime if and only if no smaller positive integer other than 1 divides it evenly.
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Jepsen: Crate 0.54.9 version divergence
In the last Jepsen analysis, we saw that RethinkDB 2.2.3 could encounter spectacular failure modes due to cluster reconfiguration during a partition. In this analysis, we’ll talk about Crate, and find out just how many versions a row’s version identifies.
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Talking to users
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Modern C is now feature complete
You find the latest version of my book at the usual place at This now contains all the material that I plan to put into it. New are “experience” parts about performance, function-like m…
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C++ Has Become More Pythonic (2014)
C++ has changed a lot in recent years. The last two revisions, C++11 and C++14, introduce so many new features that, in the words of Bjarne Stroustrup, “It feels like a new …
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