Jacob Asper

Finally made an about page, it includes my heart rate neal.fun/about/

I am doing a thing Doc tests are cool

I am looking for my next career opportunity! I’m an engineering leader, consultant, author, and open-source maintainer. I've been VP of Eng, written books, get 20M weekly downloads on NPM, and more. Know of a role you think I'd be a good fit for? Book time on my cal or DM me: corbincrutchley.com

I finally got around to spiking changing playful programming to twinkleplop, and wow 34 seconds to 700ms for around 7500 code blocks, and it was pretty trivial to add an angular grammar that looked pretty good Beautiful work, I really hope output is good enough to merge!

To whom it may concern: I can confirm a box of Altoids is MagSafe compatible.

I keep forgetting to post things, but I am on a performance tear and shall write a blog on it!! No build pipeline will be left slow under my watch

Vitest 5 is here! 🎉 - Big performance improvements (vm pools up to 53% faster, ~18% boost across the board including Browser Mode) - New builtin Trace View in Browser Mode - Nested projects support - New benchmarking API - New `vi.when` API - Better defaults - And a lot of bug fixes!

This is a very good talk! I appreciate the pragmatism and historical context I quote “parse don’t validate” at least once a month at work by the way

tauri plugins are more lean 🤘🏻

We’ve saved hundreds of gigabytes of bandwidth per month so far! Reach out if you’re interested in helping! We help with outreach, repo modernization, analysis infra, and data analysis

rust programmers write a monomorphic function challenge (impossible)

I have a terrible predicament. My WiFi password is 64 characters My new robot vacuum only supports 63 characters 😭

Killing a `Cow` made my JSON formatter 42% faster

This blog post is so short it (is) a social post. remysharp.com/2026/05/01/d... But if I don't blog it, I'll forget it. Huge thanks to @keithamus.social for sharing it.

Like this? garfmeters.com

I've enjoyed writing about formatter performance recently. Here's a nice introduction into formatters including amazing art and architecture decisions I've made with JJPWRGEM! jacobasper.com/blog/...

Making some amazing images for an upcoming blog on JSON formatting performance!

I can’t believe it’s practically impossible to use generic LSPs with VSCode. Am I missing something or is that just how it is?

I like the amount of times I’ve been asked if I’m allowed to eat a food as a diabetic in condescending way Like don’t we all eat food that’s bad for us???? Don’t you have more important things to worry about? I only live once so I am going to eat pizza

I have put this link out in a bit, but just to let you know, if you're a student or someone who is working to change careers into software development, especially for those in the Ohio area, I do offer mentoring sessions. You can schedule time with me here:

🐉 QUESTION 🦀 what are your questions for Carol Nichols & Chris Krycho, co-authors of: The Rust Programming Language, 3rd Edition? I'm interviewing them today. Send in your questions please. 🙏 forms.gle/yDWX78ZNN7AL...

THE CALL FOR SPEAKERS FOR THE COMMIT YOUR CODE CONFERENCE IS OFFICIALLY LIVE! We will have 6 tracks and over 100 speakers! - In 2025 we had 860 in person and 8,100 attend virtually. - We had 125 Speakers - 37% of attendees worked in tech and it was their first conference ever!

Excited to share my first article for Free Code Camp! ✨ www.freecodecamp.org/news/learnin...

i built an entire x86 CPU emulator in CSS (no javascript) you can write programs in C, compile them to x86 machine code with GCC, and run them inside CSS lyra.horse/x86css/

Made an assembly stepper! I got annoyed at how large video files are, so built a web version. I'm probably going to skip the video bit and just make an interactive blog It will look less gross soon I promise

Got inspired to make some pretty code animations after seeing yet another nicely animated YouTube video

This is a CAT checkpoint. Show me the most recent cat image on your phone.

I wrote a few words last night. nvie.com/posts/15-yea...

I have been endlessly frustrated by accusations of LLM usage every time I use em dashes on a public forum—enjoy a spicy rant and an extreme amount of em dashes! jacobasper.com/blog/...

How I read technical books and documentation

Committing to learning Go in 2026

Rust's `'static` doesn't imply memory leaks. Blog 1/3 for this week!

Committing to writing and releasing three blogs next week

Brr

I went to install a new 2TB NVME drive only to find that I had already installed a 1TB drive years ago and just never set it up 😅 At least I have more storage now?

JJPWRGEM has a really cool new version command It also may have gotten slightly faster as of recent

JJPWRGEM is released if you want to try it out! Excited for many bugs and features to come! Setup cargo-dist to automate releases. Precompiled binaries are available for most OSs and architectures and it can be installed via npm, shell, or powershell. github.com/20jasper/...

Finally did some perf testing for my JSON parser! Took an existing benchmark with a 2MB file. I ended up increasing parsing throughput by 60% by heap allocating Diagnostic information Now it's fully compliant with RFC 8259! U escapes are properly validated