Start Learning From the Docs. Then Find Your Own Way.
Why official technology docs should be your first step when learning, how to choose videos, books, podcasts or courses next, and how to keep up with changes.
9 min read2
Understand JavaScript, React & Next.js — one short post at a time.
Practical, diagram-first explanations you can read over coffee. 61 posts, 122 reads and counting.
Newest postRead post →
"Your Code Is Sloppy" Isn't Feedback. A Link to Line 42 Is.
How to give feedback and run review meetings with a team member using technical evidence (PRs, CI runs, incidents) instead of opinions and drama.
7 min read2
Latest
All 61 posts →AI Is Your Junior Developer. Your Product Still Needs a Senior.
AI coding tools are assistants, not owners. Why every product needs a senior engineer to review, observe and maintain what AI builds.
21 min read4
Keeping Ten Times More Objects Made Garbage Collection Four Times Cheaper
How V8's generational garbage collector really charges you: scavenges cost per survivor, and allocation site pretenuring can make long-lived objects cheaper.
7 min read
Shuffling an Array Made the Same Loop Seven Times Slower
How memory locality and CPU cache misses affect JavaScript: why array order changes loop speed for large arrays of objects, and when typed arrays help.
6 min read1
4 KB of Text Was Holding 200 MB of Memory
Why slice() in V8 can keep a huge parent string alive, how sliced strings cause memory leaks in Node.js, and how to copy a string to release it.
5 min read
A Fifth Object Shape Made the Same Loop Twice as Slow
How V8 hidden classes and inline caches work, why property reads jump in cost past four object shapes, and how to keep hot code monomorphic.
6 min read1
1,000 Cards, 1,000 Layouts, and requestAnimationFrame Didn't Help
What layout thrashing and forced reflow are, why reading offsetWidth after a style change is so slow, and how batching reads and writes fixes it.
5 min read1
The $4.35 Item That Was Charged $4.34
Why 0.1 + 0.2 !== 0.3 in JavaScript, how floating-point math drops a cent when converting dollars to cents, and why money should be stored as integers.
5 min read3
Series
View all →Short posts on one theme, meant to be read in order. Each part stands alone, and together they build the full picture.
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