I'm putting a talk together about #programming Mandelbrot image generator with insight into profiling and optimisation. Main part will be normal optimisations, #simd, #multithreading, and possibly gpu acceleration.
I'll also show micro benchmarking, hotspot/perf, intel advisor, and also inspecting assembly code.
Any other interesting bits I should look into putting into my talk?
Multithreading in JavaScript With Web Workers, by @honeybadger:
https://www.honeybadger.io/blog/javascript-web-workers-multithreading/
Samchika – A Java Library for Fast, Multithreaded File Processing
https://github.com/MayankPratap/Samchika
#HackerNews #Java #Multithreading #FileProcessing #Samchika #Library #OpenSource #TechNews
Advanced Java Multithreading Patterns for High-Performance Applications
Learn advanced Java multithreading techniques to build high-performance applications. Discover executor services, CompletableFuture, Fork/Join framework, and concurrent collections for efficient resource utilization and responsiveness. #JavaConcurrency
There is a pattern I am very fond of - “one database per tenant” in web applications with multiple, isolated users. Recently, I needed to fix an application I had for a long time where this database-per-tenant multitenancy utterly broke down, because I was doing connection management wrong. Which begat the question: how do you even approach doing it right? And it turns out I was not alone in this. The most popular gem for multitenancy - Apartment - which I have even used in my failed startup back in the day - has the issue too. The culprit of does not handle multithreading very well is actually deeper. Way deeper. Doing runtime-defined multiple databases with Rails has only recently become less haphazard, and there are no tools either via gems or built-in that facilitate these flows. It has also accrued a ton of complexity, and also changes with every major Rails revision. TL;DR If you need to do database-per-tenant multitenancy with Rails or ActiveRecord right now - grab the middleware from this gist and move on. If you are curious about the genesis of this solution, strap in - we are going on a tour of a sizeable problem, and of an API of stature - the ActiveRecord connection management. Read on and join me on the ride! Many thanks to Kir Shatrov and Stephen Margheim for their help in this.
#StructuredConcurrency brings order to the chaos of concurrent code. But the current #API may not survive. @ronveen reviews what works, what’s fragile - and what’s next. Is your concurrency model future-proof?
Java exception of the day: FileAlreadyExistsException on
Files.copy(body, requestedFile, StandardCopyOption.REPLACE_EXISTING);
🤷 It is not as weird if we take into account multiple threads. From the JDK code of Files.copy after deleting the requestedFile first:
} catch (FileAlreadyExistsException x) {
... other stuff deleted ...
// someone else won the race and created the file
throw x;
}
Gareth Lloyd (He/him)
TechKeysX
Frontend Dogma
Mille e Una Avventura
Hacker News
Erik C. Thauvin
N-gated Hacker News
JAVAPRO
Harald