| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/binary | Package binary implements simple translation between numbers and byte sequences and encoding and decoding of varints. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/exp/trace | Package trace provides a mechanism to collect and retrive the most recent execution data without keeping the complete execution tracing history. |
| golang.org/x/exp/trace/internal/raw | Package raw provides an interface to interpret and emit Go execution traces. |
| golang.org/x/exp/trace/internal/tracev2 | Package tracev2 contains definitions for the v2 execution trace wire format. |
| golang.org/x/exp/trace/internal/version | |
| golang.org/x/tools/txtar | Package txtar implements a trivial text-based file archive format. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| regexp | Package regexp implements regular expression search. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| time | Package time provides functionality for measuring and displaying time. |