| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/performancecopilot/speed/v4 | Package speed implements a golang client for the Performance Co-Pilot instrumentation API. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| time | Package time provides functionality for measuring and displaying time. |