Software engineer / Transformation consultant / Writing about topics not qualified about: usage of excess energy.
Singapore
Joined June 2009
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Ordered one to fight off the haze in Singapore (which has been very bad this year).
Should arrive very soon.
This Air Purifier mines Bitcoin! ⛏️🔥
Here's the unboxing + review of the Heatbit Bitair
Buy one here:
heatbit.com/discount/cheersj…
What is the most expensive arithmetic operation for a CPU?
A division.
It takes ~10-30 cycles when a subtraction only takes 1.
Modified a running sum to replace a division on every tick with a simple subtraction.
Benchmarked on an isolated core.
Gain: ~36%
#lowlatency
Core isolation means telling the OS scheduler to stop pre-empting processes on a specific core.
This has a significant measurable impact on tail latency.
Ran the experiment on Linux with Intel Core i7 at 2.4Ghz, measuring a running sum aggregate on a feed handler.
Results
👇
In Ammous’ “The Gold Standard”, a fascinating description of an alternative version of history starting in 1915, Keynes is sentenced to death for having participated in the BoE war bond fraud.
The sentence is fictional but the fraud was not.
theguardian.com/business/202…
“Flash was born because the tablet failed and it died because the tablet returned”
Remember when you couldn’t play video in a browser without it? Amazing story.
youtu.be/UWuB74Gz510
New low-latency C++ home lab:
- a mobile dev box: Ubuntu VM running on a MacBook
- a fixed “production” box: bare metal Linux on a refurbished 2013 MacBook with Intel chip for deep access to perf stat measurements and hardware tweaks.
primal.net/e/nevent1qqsrzfma…
Matt coding outside London retweeted
Parce qu’on ne fait pas de Bitcoin mining.
⚡️ Avec 520 heures de prix négatifs sur les marchés, la France produit trop d'électricité. Mais alors, pourquoi nos factures ne baissent-elles pas ? 📉🤔
👉 Les explications de @NicolasDOZE dans "Doze et l'éco"
Recycling ♻️: installed Ubuntu on my MacBook pro 2013.
Removed the swollen battery before it explodes and burns my apartment.
The objective? Have an Intel-based bare metal environment rather than a VM, so that I can practice perf stat, hardware counters, TMA and flame graphs.
We don't need to use virtual functions when the complete set of possible classes is known at compile time.
So those clever interface-based calls that used to give us a boner in regular C++ or C# are not for a low latency hot path context.
youtu.be/NH1Tta7purM
Very good material packed with nuanced technical approaches to make C++ systems a little bit faster (and how to measure it)
youtu.be/sX2nF1fW7kI
Laurie Kirk invents a word to describe the situations where the programmer knows something the operating system doesn’t.
It’s really what low-latency coding is all about: have the OS stop guessing and trying to help.
youtu.be/ScwvInRZdKE
Matt coding outside London retweeted
HERE’S⚡️🎥 INDONESIA'S @MyFirstBitcoin_ UNCONFERENCE IN MOTION!
Learning about Bitcoin is one thing. Building a community around it is another. 🧡 So many conversations, new connections, and unforgettable moments.
Surabaya, we made some memories. 🇮🇩
Next walk:
Sunday 1 November 2026 4pm,
same meeting place, same route.
@BitcoinWalkOrg
Next Singapore walk in Bukit Timah hill
Sunday 6 September 4pm
primal.net/e/nevent1qqsvntnr…
@BitcoinWalkOrg
