[WIP] @nodejs/nodejs.org/issues/7914

[Copilot]

• Research libuv 1.45.0 changes to event loop phases
• Understand current documentation structure and content
• Update event loop phases documentation to reflect timers running only after poll phase
• Update timers section to clarify modern behavior (Node.js 20.0.0+)
• Add note about libuv version changes and implications for setImmediate
• Add cautions about setImmediate starving the event loop in modern versions
• Update setImmediate vs setTimeout section with modern behavior notes
• Commit documentation changes
• Test and verify documentation builds correctly
• Review and finalize changes

Changes Made

Updated /apps/site/pages/en/learn/asynchronous-work/event-loop-timers-and-nexttick.md to reflect the libuv 1.45.0 changes:

1. Added version-specific note in Phases Overview explaining the change from libuv 1.45.0 (Node.js 20.0.0+)
2. Updated timers section to clarify that timers now only run once per event loop iteration, after poll phase
3. Enhanced check section with warning about setImmediate potentially starving the event loop more easily
4. Updated setImmediate vs setTimeout section with modern behavior implications
5. Added caution about using multiple setImmediate calls in performance-critical applications

These changes address issue #7914 by updating the documentation to accurately reflect the current event loop behavior.

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[avivkeller]

I'm testing this out, curious what it'll do

[avivkeller]

Copilot's auth doesn't appear to be working, I suppose AI isn't perfect yet :-/