Dev Tools · 1h ago
JavaScript devs beware: Python's `await` doesn't mean 'meanwhile'
A common JavaScript concurrency pattern—calling async functions early and awaiting them later—fails in Python because Python coroutines are lazy, not eager. The JS idiom dispatches I/O immediately, but Python only starts execution at the `await` statement, causing sequential instead of parallel execution. This silent performance bug can double latency for developers porting code between languages.
Meridian48 take
The article highlights a subtle but critical difference in async semantics that could trip up polyglot developers, but the fix (using asyncio.gather) is straightforward once you know the gotcha.
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