[#1450] engine: Add benchmark for Inhume operation

Signed-off-by: Aleksey Savchuk <a.savchuk@yadro.com>

pkg/local_object_storage/engine/inhume_test.go

@@ -2,6 +2,7 @@ package engine
 
 import (
 	"context"
+	"fmt"
 	"strconv"
 	"testing"
 
@@ -12,8 +13,11 @@ import (
 	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/object"
 	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
+	objecttest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/test"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/sync/errgroup"
 )
 
 func TestStorageEngine_Inhume(t *testing.T) {
@@ -137,3 +141,59 @@ func TestInhumeExpiredRegularObject(t *testing.T) {
 		require.NoError(t, err)
 	})
 }
+
+func BenchmarkInhumeMultipart(b *testing.B) {
+	// The benchmark result insignificantly depends on the number of shards,
+	// so do not use it as a benchmark parameter, just set it big enough.
+	numShards := 100
+
+	for numObjects := 1; numObjects <= 10000; numObjects *= 10 {
+		b.Run(
+			fmt.Sprintf("objects=%d", numObjects),
+			func(b *testing.B) {
+				benchmarkInhumeMultipart(b, numShards, numObjects)
+			},
+		)
+	}
+}
+
+func benchmarkInhumeMultipart(b *testing.B, numShards, numObjects int) {
+	b.StopTimer()
+
+	engine := testNewEngine(b, WithShardPoolSize(uint32(numObjects))).
+		setShardsNum(b, numShards).prepare(b).engine
+	defer func() { require.NoError(b, engine.Close(context.Background())) }()
+
+	cnt := cidtest.ID()
+	eg := errgroup.Group{}
+
+	for range b.N {
+		addrs := make([]oid.Address, numObjects)
+
+		for i := range numObjects {
+			prm := PutPrm{}
+
+			prm.Object = objecttest.Object().Parent()
+			prm.Object.SetContainerID(cnt)
+			prm.Object.SetType(objectSDK.TypeRegular)
+
+			addrs[i] = object.AddressOf(prm.Object)
+
+			eg.Go(func() error {
+				return engine.Put(context.Background(), prm)
+			})
+		}
+		require.NoError(b, eg.Wait())
+
+		ts := oidtest.Address()
+		ts.SetContainer(cnt)
+
+		prm := InhumePrm{}
+		prm.WithTarget(ts, addrs...)
+
+		b.StartTimer()
+		_, err := engine.Inhume(context.Background(), prm)
+		require.NoError(b, err)
+		b.StopTimer()
+	}
+}