| bytes | Package bytes implements functions for the manipulation of byte slices. |
| cloud.google.com/go/profiler | Package profiler is a client for the Cloud Profiler service. |
| compress/gzip | Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952. |
| flag | Package flag implements command-line flag parsing. |
| log | Package log implements a simple logging package. |
| math/rand | Package rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |