#Bitcoin. open source enthusiast, founder @GreenAddress, ex-CTO @Blockstream
Joined August 2014
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Lawrence Nahum retweeted
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Lawrence Nahum retweeted
wrote the same word-counting program 5 times, each faster than the last
best result: 494× faster than my first Python version — by using SIMD in C
all are O(n), but some squeeze far more from the CPU and memory!
ALT (screenshot of blog) Counting Words at SIMD Speed Aug 2025 I've written some progressively faster word counting programs. First, we'll start with Python, and then we'll drop down to C, and finally, we'll use single instruction, multiple data (SIMD) programming to go as fast as possible. The task is to count the words in an ASCII text file. For example, Hello there! contains 2 words, and my 1 GiB benchmark text file contains 65 million words. At a high level: read bytes, scan while tracking minimal state, write the count to stdout. These are the results from my Apple M1 Pro that I'll dig into: Python (byte loop): 89.6 s Python + re: 13.7 s C (scalar loop): 1.205 s C + ARM NEON SIMD: 249 ms C + ARM NEON SIMD + threads: 181 ms You can also jump straight to the source files.
Lawrence Nahum retweeted
Today we are announcing a partnership with Obscura VPN, a newly launched two-party VPN service that uses our WireGuard VPN servers as its “exit hop”.
Read more here: mullvad.net/blog/mullvad-par…
Lawrence Nahum retweeted
Reminder that @pythcoiner started a discussion to extend the 1.3 year limit of relative timelocks on Delving, please have a look and share your opinion!
For @lianabitcoin , it would mean no need to refresh so often.
delvingbitcoin.org/t/explori…
Lawrence Nahum retweeted
Eh, to be fair, he also warned Bitcoiners about the dangers of missing out running BitcoinXT in 2015, running Grin in 2019, and "owning" wizard jpegs in 2023. But I love cherries too, they are tasty.
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Lawrence Nahum retweeted
I read it, while I'm more polite, agree with @bergealex4. Very bad what-if. Nuke it immediately. Lost touch with users and the ecosystem or not getting how that scans. No offense, but lease hear the feedback that is a bad, bad, bad what-if.
Lawrence Nahum retweeted
So I have looked a a number of DIY self custody options and decided to do a brief overview here youtu.be/Yoq99f_pv9w for those who might be interested to give it a try.
There is certainly something for everyone :)
Lawrence Nahum retweeted
The battle for Full-RBF is finally over. 😂
Bitcoin Core v29.0 was released!
It is available from: bitcoincore.org/en/download/
Release notes: bitcoincore.org/en/releases/…
Lawrence Nahum retweeted
Here is one simple thing you can do that would be very helpful to test the Bitcoin Core release candidate.
At home, start bitcoind with the -natpmp option. Let it start and stop it. Check if it could successfully open a port on your router.
You can check this by looking at the startup logs (which should be displayed in your terminal by default if you start with only `bitcoind -natpmp`). Among the first lines look for mentions of "pcp", "natpmp" or "portmap".
Read the relevant log lines to determine whether the port mapping on your router was successful. If unsure, feel free to share it with me directly (dm, emails, ..) or with the project (IRC, 29.0 testing feedback issue, ..).
Report the model of your router and whether the port mapping was successful.
Bitcoin Core 29.0rc2 is a release candidate for the next major version of the network’s predominate full node.
bitcoinops.org/en/newsletter…
Lawrence Nahum retweeted
nice walk through of @blockstream jade plus hardware wallet by @YTCryptoGuide. he also shows a DIY jade model with camera.
Had a look at the @Blockstream Jade plus youtu.be/Jy_9-9InLL8
Nice improvement from the Jade with larger screen, more responsive camera, airgapped USB signing and a genuine check
T-display S3 pro camera (GC0308) needs work on the DIY side for battery + new USB functionality
Lawrence Nahum retweeted
Introducing... Jade Plus. The next generation bitcoin-only hardware wallet from @Blockstream
With a redesigned form factor, hardware improvements and a brand new feature set... Jade Plus offers a premium and intuitive experience for beginners & veterans alike
Let's dive in 👇
Lawrence Nahum retweeted
facebook software is spyware for zucknation.
past time i deleted instagram 🪦
Lawrence Nahum retweeted
Really, what is it going to take for a judge to actually put a stop to this travesty? I don't think it's an exaggeration to say that today Wright is one of the most prolific and shameless liars and forgers of evidence the world has ever seen. And the courts just let him continue.
Lawrence Nahum retweeted
Further Craig Wright forgeries revealed! I don't know if I can accurately convey just how batshit insane this is, but let's try. 🧵
That UK courts continue to take him seriously is a true testament to the privilege afforded to well-funded litigants.
bitcoindefense.org/wp-conten…
Lawrence Nahum retweeted
Hard pass on that "settlement."
Just like Craig Wright forges documents and doesn't quite tell the truth, his description of the settlement offer isn't quite accurate either - it comes with loopholes that would allow him to sue people all over again.