| 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/codes | Package codes defines the canonical error codes used by gRPC. |
| google.golang.org/grpc/credentials | Package credentials implements various credentials supported by gRPC library, which encapsulate all the state needed by a client to authenticate with a server and make various assertions, e.g., about the client's identity, role, or whether it is authorized to make a particular call. |
| 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/grpcrand | |
| 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 | |
| google.golang.org/grpc/status | Package status implements errors returned by gRPC. |
| google.golang.org/grpc/testdata | |
| google.golang.org/grpc/xds | Package xds contains an implementation of the xDS suite of protocols, to be used by gRPC client and server applications. |
| io | Package io provides basic interfaces to I/O primitives. |
| math | Package math provides basic constants and mathematical functions. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| net/http | Package http provides HTTP client and server implementations. |
| net/http/pprof | Package pprof serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |