dm-control mujoco tasks use A LOT of cpu's

[Potentially related to this post](https://github.com/google-deepmind/mujoco/issues/203). I was wondering why my code slows down when running a few seeds at a time. When I looked, the CPU's are being throttled by running multiple instances of the MuJoCo environments (specifically I was checking with walker-walk). Using just one environment was maxing out several cores. Is there a way to stop this? I compared with hopper/half-cheetah from the Gymnasium implementations and they use just a single CPU per environment. Do I need to change some setting in dm-control to fix this?

If any more information is needed (e.g. resource usage from the terminal), then please let me know what else I can add.

首先，使用 dm-control 的 walker-walk 环境和多个 seed 重现已报告的 CPU 使用情况，然后将其与 Gymnasium 的 hopper 和 half-cheetah 实现进行比较。调查 dm-control 是否提供了用于控制每个环境 CPU 使用量的设置。完成的标准是确定原因，并记录或解决防止意外使用多核 CPU 的方法。

由索引模型根据 Issue 内容生成。