You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: bench.go
    path of file: ./repos/storj/private/kvstore/testsuite
    
    the code of the file until where you have to start completion: // Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.

package testsuite

import (
	"path"
	"strconv"
	"testing"

	"golang.org/x/sync/errgroup"

	"storj.io/common/testcontext"
	"storj.io/storj/private/kvstore"
)

// RunBenchmarks runs common kvstore.Store benchmarks.
func RunBenchmarks(b *testing.B, store kvstore.Store) {
	var words = []string{
		"alpha", "beta", "gamma", "delta", "iota", "kappa", "lambda", "mu",
		"άλφα", "βήτα", "γάμμα", "δέλτα", "έψιλον", "ζήτα", "ήτα", "θήτα", "ιώτα", "κάππα", "λάμδα", "μυ",
		"nu", "xi", "omicron", "pi", "rho", "sigma", "tau", "upsilon", "phi", "chi", "psi", "omega",
		"νυ", "ξι", "όμικρον", "πι", "ρώ", "σίγμα", "ταυ", "ύψιλον", "φι", "χι", "ψι", "ωμέγα",
	}

	words = words[:20] // branching factor
	if testing.Short() {
		words = words[:2]
	}

	var items kvstore.Items

	k := 0
	for _, a := range words {
		for _, b := range words {
			for _, c := range words {
				items = append(items, kvstore.Item{
					Key:   kvstore.Key(path.Join(a, b, c)),
					Value: kvstore.Value(strconv.Itoa(k)),
				})
				k++
			}
		}
	}

	ctx := testcontext.New(b)
	defer ctx.Cleanup()

	defer cleanupItems(b, ctx, store, items)

	b.Run("Put", func(b *testin
    
func RunBenchmarks(b *testing.B, store kvstore.Store) {
	var words = []string{
		"alpha", "beta", "gamma", "delta", "iota", "kappa", "lambda", "mu",
		"άλφα", "βήτα", "γάμμα", "δέλτα", "έψιλον", "ζήτα", "ήτα", "θήτα", "ιώτα", "κάππα", "λάμδα", "μυ",
		"nu", "xi", "omicron", "pi", "rho", "sigma", "tau", "upsilon", "phi", "chi", "psi", "omega",
		"νυ", "ξι", "όμικρον", "πι", "ρώ", "σίγμα", "ταυ", "ύψιλον", "φι", "χι", "ψι", "ωμέγα",
	}

	words = words[:20] // branching factor
	if testing.Short() {
		words = words[:2]
	}

	var items kvstore.Items

	k := 0
	for _, a := range words {
		for _, b := range words {
			for _, c := range words {
				items = append(items, kvstore.Item{
					Key:   kvstore.Key(path.Join(a, b, c)),
					Value: kvstore.Value(strconv.Itoa(k)),
				})
				k++
			}
		}
	}

	ctx := testcontext.New(b)
	defer ctx.Cleanup()

	defer cleanupItems(b, ctx, store, items)

	b.Run("Put", func(b *testing.B) {
		b.SetBytes(int64(len(items)))
		for k := 0; k < b.N; k++ {
			var group errgroup.Group
			for _, item := range items {
				key := item.Key
				value := item.Value

				group.Go(func() error {
					return store.Put(ctx, key, value)
				})
			}

			if err := group.Wait(); err != nil {
				b.Fatalf("Put: %v", err)
			}
		}
	})

	b.Run("Get", func(b *testing.B) {
		b.SetBytes(int64(len(items)))
		for k := 0; k < b.N; k++ {
			for _, item := range items {
				_, err := store.Get(ctx, item.Key)
				if err != nil {
					b.Fatal(err)
				}
			}
		}
	})
}