Heaps for Event-Driven Systems: A Deep Dive
Event-driven systems live or die by how efficiently they answer one question: what should happen next? Timers, retries, animation frames, message timeouts, deferred jobs, and simulation ticks all compete to run at specific times or priorities. You could scan a list to find the next item (cheap to write, slow to run), or you can use a heap - the data structure that makes next a constant-time peek with logarithmic updates. (Note: the JavaScript runtime memory heap is unrelated to the heap data structure used here.)
What the loop must guarantee In every iteration, an event loop must:
In the full article
What it covers
- The Event Loop’s Core Problem
- Minimal Mental Model
- Behavior Under Real Workloads
- Why a Heap Beats Alternatives Here
- Adjacent Uses in Event-Driven Systems
- JavaScript Specifics & Gotchas
- When Not to Use a Heap
- Final Takeaway
The full article is on Bliztek, LLC Blog, my web development company's blog. This page is the summary.
- Read time
- 10 min
- Sections
- 8
