package memory import (	"context"	"runtime"	"sync" 	"github.com/rclone/rclone/cmd"	"github.com/rclone/rclone/cmd/test"	"github.com/rclone/rclone/fs"	"github.com/rclone/rclone/fs/operations"	"github.com/spf13/cobra") func init() {	test.Command.AddCommand(commandDefinition)} var commandDefinition = &cobra.Command{	Use:   "memory remote:path",	Short: `Load all the objects at remote:path into memory and report memory stats.`,	Run: func(command *cobra.Command, args []string) {		cmd.CheckArgs(1, 1, command, args)		fsrc := cmd.NewFsSrc(args)		cmd.Run(false, false, command, func() error {			ctx := context.Background()			objects, _, err := operations.Count(ctx, fsrc)			if err != nil {				return err			}			objs := make([]fs.Object, 0, objects)			var before, after runtime.MemStats			runtime.GC()			runtime.ReadMemStats(&before)			var mu sync.Mutex			err = operations.ListFn(ctx, fsrc, func(o fs.Object) {				mu.Lock()				objs = append(objs, o)				mu.Unlock()			})			if err != nil {				return err			}			runtime.GC()			runtime.ReadMemStats(&after)			usedMemory := after.Alloc - before.Alloc			fs.Logf(nil, "%d objects took %d bytes, %.1f bytes/object", len(objs), usedMemory, float64(usedMemory)/float64(len(objs)))			fs.Logf(nil, "System memory changed from %d to %d bytes a change of %d bytes", before.Sys, after.Sys, after.Sys-before.Sys)			return nil		})	},}