| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| google.golang.org/grpc/benchmark | Package benchmark implements the building blocks to setup end-to-end gRPC benchmarks. |
| google.golang.org/grpc/benchmark/stats | Package stats tracks the statistics associated with benchmark runs. |
| google.golang.org/grpc/credentials/insecure | Package insecure provides an implementation of the credentials.TransportCredentials interface which disables transport security. |
| google.golang.org/grpc/grpclog | Package grpclog defines logging for grpc. |
| google.golang.org/grpc/internal/syscall | Package syscall provides functionalities that grpc uses to get low-level operating system stats/info. |
| google.golang.org/grpc/interop/grpc_testing | |
| 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. |
| runtime/pprof | Package pprof writes runtime profiling data in the format expected by the pprof visualization tool. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |