Question

I’m writing a Python program with a lot of file access. It’s running surprisingly slowly, so I used cProfile to find out what was taking the time.

It seems there’s a lot of time spent in what Python is reporting as ‘{built-in method acquire}’. I have no idea what this method is. What is it, and how can I speed up my program?

Answer 1

Without seeing your code, it is hard to guess. But to guess I would say that it is the threading.Lock.acquire method. Part of your code is trying to get a threading lock, and it is waiting until it has got it.

There may be simple ways of fixing it by

• restructuring your file access,
• not locking,
• using blocking=False,
• or even not using threads at all.

But again, without seeing your code, it is hard to guess.