Imports of testgc command

PathSynopsis
encoding/binaryPackage binary implements simple translation between numbers and byte sequences and encoding and decoding of varints.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/dgraph-io/badger/v3Package badger implements an embeddable, simple and fast key-value database, written in pure Go.
github.com/dgraph-io/badger/v3/y
github.com/dgraph-io/ristretto/z
logPackage log implements a simple logging package.
math/randPackage rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work.
net/httpPackage http provides HTTP client and server implementations.
net/http/pprofPackage pprof serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.
osPackage os provides a platform-independent interface to operating system functionality.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.
sync/atomicPackage atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms.
timePackage time provides functionality for measuring and displaying time.