```python title="train.py" hl_lines="3 7" from torch.utils.data import DataLoader sample = FOVDataset(store_path)[0] # (1)! loader = DataLoader(FOVDataset(store_path), num_workers=4) # (2)! for batch ...

There is a very common way to solve performance problems in software. Buy a bigger machine. If that does not work, add more RAM. Then more CPU. Then another machine. Eventually somebody says “cluster, ...

Your application already uses asyncio (for example, FastAPI, aiohttp, or Discord bots) and you need to integrate database calls without blocking the event loop. Database queries are I/O-bound, not CPU ...

FastAPI combines type-based request validation with generated OpenAPI documentation; response models define and check output. Async handlers can overlap waits on databases or external APIs when their ...

Making Python code run concurrently is a solved problem. asyncio.gather, a thread pool, a handful of await calls — any of these get you parallel I/O in an afternoon. The harder problem, the one that ...

Один важный момент: всё написанное здесь относится к CPython — стандартной реализации Python, которую вы, скорее всего, и используете. Jython и IronPython устроены иначе, там GIL нет. Но в 99% случаев ...

PyPy, an alternative runtime for Python, uses a specially created JIT compiler to yield potentially massive speedups over CPython, the conventional Python runtime. But PyPy’s exemplary performance has ...

在 async/await 编程中，事件循环（event loop）负责调度所有异步任务。如果你直接在异步代码里调用一个阻塞的同步函数（如数据库操作、文件读写、第三方库等），会导致整个事件循环被卡住，影响其他请求的响应。 解决办法： 把阻塞的同步函数放到线程池中 ...