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6.8Key Takeaways
- Every async operation must be awaited — forgotten await is the most common async bug
- Use
Promise.all/asyncio.gatherfor concurrent operations - Use
Promise.allSettledwhen you need all results regardless of individual failures - Avoid shared state between concurrent tests — each test should create its own data
- Never block the event loop with synchronous operations in async code
- Enable linting rules to catch missing await at compile time