# Built-in Functions and Modules

## Built-in Functions

* Written in C language, much faster and well maintained, should know the use cases of them

![](https://1349652175-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MaD-VX0We9tI6KrYW5F%2F-MeeWpMMtbvk3gJZn146%2F-MfIf3x6tHfPiQLurC33%2Fimage.png?alt=media\&token=e77b3766-7a17-4ef2-813f-fa64bf883e06)

## References for Further Reading

* [https://towardsdatascience.com/ten-tricks-to-speed-up-your-python-codes-c38abdb89f18](https://towardsdatascience.com/ten-tricks-to-speed-up-your-python-codes-c38abdb89f18)
