devtools.fm: Developer Tools, Open Source, Software Development Charles Lowell - Frontside, Effection, and Structured Concurrency
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Mar 10, 2025 In this discussion, Charles Lowell, a developer and consultant known for the Effection library, dives into structured concurrency in JavaScript. He breaks down how structured concurrency can solve the limitations of promises and improves resource management. The conversation includes insights into enhancing developer experience with tools like Backstage and the significance of 'affection' in managing concurrent operations. Lowell also touches on debugging challenges and the forthcoming V4 release, emphasizing community engagement in JavaScript asynchrony.
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Async/Await Limitations
- Async/await's biggest flaw is the inability to control an async function once it awaits a promise.
- This can lead to resource leaks if the promise never resolves, affecting the entire call stack.
Sync/Async Split
- Async/await creates a false dichotomy between synchronous and asynchronous operations.
- This split complicates event handling, caching, and API design in JavaScript.
Effection's Origin
- Charles Lowell was inspired to create Effection after experiencing Ember.js's elegant concurrency management.
- He later adapted the pattern for a backend testing framework.