Python Concurrency in 2026: Threads, Asyncio or Multiprocessing?
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Since Sep 15, 2026.
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Description
Goal
Explore Python concurrency in 2026 through practical experiments and benchmarks, understanding when to use threads, asyncio, or multiprocessing.
Topics
- Python concurrency
- Threads
- ThreadPoolExecutor
- Asyncio
- Event loops
- Multiprocessing
- ProcessPoolExecutor
- CPU-bound vs I/O-bound workloads
- GIL / free-threaded Python
- Benchmarking
- Experiments
- Sequential vs threads
- Sequential vs asyncio
- Sequential vs multiprocessing
- I/O-bound workloads
- CPU-bound workloads
- Different numbers of workers/tasks
- Memory and CPU usage
Questions
- When should I use threads?
- When should I use asyncio?
- When should I use multiprocessing?
- What actually happens when using await?
- Why does asyncio help with I/O but not CPU-bound work?
- How does the GIL affect these approaches?
- How does free-threaded Python change the picture?
- What are the real overheads of each approach?
- ...
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