The Daily Index — Friday, September 5, 2025 · TLDR Index

ARTICLES & TUTORIALS

TLDR Web Dev

TLDR Web Dev

MEMORY IS SLOW, DISK IS FAST

Memory is not always faster than disk, as disk I/O can outperform memory caching in specific scenarios. Experiments involving counting integers in a large dataset show that traditional memory access methods like `mmap()` introduce overhead due to memory latency. By using an `io_uring` based I/O engine to stream data directly from disk, faster data processing is achieved compared to accessing data from the page cache.

bitflux.ai · 24 min

TLDR Web Dev

HOW WE BUILT AN INTERPRETER FOR SWIFT (A COMPILED LANGUAGE)

Bitrig built a Swift interpreter to dynamically run Swift apps on iPhones without requiring compilation and signing through Xcode. The interpreter uses SwiftSyntax to parse Swift code and represents runtime values using an `InterpreterValue` enum, handling both native and custom types. For framework APIs like SwiftUI, it pre-compiles calls to initializers and other functions, parsing `.swiftinterface` files to automate the process.

bitrig.app · 5 min

TLDR Web Dev

WHERE'S THE SHOVELWARE? WHY AI CODING CLAIMS DON'T ADD UP

Claims of increased developer productivity due to AI coding tools are unfounded. Data shows no real surge in software releases despite widespread AI adoption. If these claims were true, there would be a noticeable increase in new software releases and a flood of "shovelware”.

mikelovesrobots.substack.com · 11 min

TLDR Web Dev

I SHOULD HAVE LOVED ELECTRICAL ENGINEERING

This dev was initially drawn to Electrical Engineering by the promise of hardware innovation and better human-computer interaction. However, their experience in a Computer Science and Engineering program led to disillusionment with the memorization-heavy engineering coursework and a lack of connection to real-world innovation. They found more satisfaction in software development, web applications, and research in physics, eventually switching their major to CS + Physics.

blog.tdhttt.com · 11 min

TLDR Web Dev

SAYING NO IS NOT A FREE ACTION IN THE WORLD OF SOFTWARE ENGINEERING

Saying no in software engineering, while important for work-life balance, comes with psychological and social costs, making it harder than it seems. People often avoid refusing requests due to negative connotations, potential career risks, and the desire to please others. Instead of simply telling people to "just say no," we should understand the burden of refusal and create a supportive culture that encourages saying no when necessary.

shiftmag.dev · 6 min

TLDR Web Dev

MIT SAYS AI ISN'T REPLACING YOU… IT'S JUST WASTING YOUR BOSS' MONEY

Most companies are failing to see a return on their AI investments. Fewer than 10% of AI pilot projects generate real profit. This shows that the value lies not in flashy AI applications, but in practical uses like streamlining operations and automating tasks that free up human employees for higher-value work. Startups focusing on solving specific problems with AI are seeing more success.

interviewquery.com · 3 min

TLDR Web Dev

ANDREJ KARPATHY ON HOW TO BECOME AN EXPERT AT ANYTHING

One can become an expert at anything by learning through real projects on demand and teaching what you learn.

substack.com · 1 min

TLDR Web Dev

VIBE CODING OUR WAY TO DISASTER

To avoid AI-driven code complexity, devs should prioritize thorough problem understanding and structured planning before using AI tools for implementation.

softwarearthopod.substack.com · 11 min

TLDR Web Dev

WRITING CODE WAS NEVER THE BOTTLENECK

While LLMs have reduced the cost of writing code, understanding, testing, and maintaining that code, especially in a team setting, still remains the true bottleneck in software engineering.

ordep.dev · 3 min