}
	}
	// Benchmark ends here. Stop timer.
	b.StopTimer()
}

// Benchmark utility functions for ObjectLayer.PutObjectPart().
// Creates Object layer setup ( MakeBucket ) and then runs the PutObjectPart benchmark.
func runPutObjectPartBenchmark(b *testing.B, obj ObjectLayer, partSize int) {
	var err error
	// obtains random bucket name.
	bucket := getRandomBucketName()

				}
			}
		})
	}
}

// Benchmarks for ObjectLayer.PutObjectPart().
// The intent is to benchmark PutObjectPart for various sizes ranging from few bytes to 100MB.
// Also each of these Benchmarks are run both Erasure and FS backends.

// BenchmarkPutObjectPart5MbFS - Benchmark FS.PutObjectPart() for object size of 5MB.
func BenchmarkPutObjectPart5MbFS(b *testing.B) {

	_, err := base64.RawURLEncoding.DecodeString(uploadID)
	if err != nil {
		return MalformedUploadID{
			UploadID: uploadID,
		}
	}
	return checkObjectArgs(ctx, bucket, object)
}

// Checks for PutObjectPart arguments validity, also validates if bucket exists.
func checkPutObjectPartArgs(ctx context.Context, bucket, object, uploadID string) error {
	return checkMultipartObjectArgs(ctx, bucket, object, uploadID)
}

				idxCb = compressionIndexEncrypter(objectEncryptionKey, idxCb)
			}
			opts.EncryptFn = metadataEncrypter(objectEncryptionKey)
		}
	}
	opts.IndexCB = idxCb

	putObjectPart := objectAPI.PutObjectPart

	partInfo, err := putObjectPart(ctx, bucket, object, uploadID, partID, pReader, opts)
	if err != nil {
		// Verify if the underlying error is signature mismatch.
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)

		g.WaitErr()
	}

	return evalDisks(disks, errs), err
}

// PutObjectPart - reads incoming stream and internally erasure codes
// them. This call is similar to single put operation but it is part
// of the multipart transaction.
//
// Implements S3 compatible Upload Part API.

	md5Hex := getMD5Hash(fiveMBBytes)
	_, err = objLayer.PutObjectPart(ctx, "bucket1", "mpartObj1", res.UploadID, 1, mustGetPutObjReader(t, bytes.NewReader(fiveMBBytes), 5*humanize.MiByte, md5Hex, ""), opts)
	if err != nil {
		t.Fatal(err)
	}
	// PutObjectPart should succeed even if part already exists. ref: https://github.com/minio/minio/issues/1930

		return PartInfo{}, err
	}

	return z.PutObjectPart(ctx, destBucket, destObject, uploadID, partID,
		srcInfo.PutObjReader, dstOpts)
}

// PutObjectPart - writes part of an object to hashedSet based on the object name.

			hr, err := hash.NewReader(ctx, io.LimitReader(gr, part.Size), part.Size, "", "", part.ActualSize)
			if err != nil {
				return fmt.Errorf("rebalanceObject: hash.NewReader() %w", err)
			}
			pi, err := z.PutObjectPart(ctx, bucket, oi.Name, res.UploadID,
				part.Number,
				NewPutObjReader(hr),
				ObjectOptions{
					PreserveETag: part.ETag, // Preserve original ETag to ensure same metadata.
					IndexCB: func() []byte {

			HeadersRegexp(xhttp.AmzCopySource, ".*?(\\/|%2F).*?").
			HandlerFunc(s3APIMiddleware(api.CopyObjectPartHandler)).
			Queries("partNumber", "{partNumber:.*}", "uploadId", "{uploadId:.*}")
		// PutObjectPart
		router.Methods(http.MethodPut).Path("/{object:.+}").
			HandlerFunc(s3APIMiddleware(api.PutObjectPartHandler, traceHdrsS3HFlag)).
			Queries("partNumber", "{partNumber:.*}", "uploadId", "{uploadId:.*}")

}

// TestAPIPutObjectPartHandlerStreaming - Tests validate the response of PutObjectPart HTTP handler
// when the request signature type is `streaming signature`.
func TestAPIPutObjectPartHandlerStreaming(t *testing.T) {
	defer DetectTestLeak(t)()
	ExecExtendedObjectLayerAPITest(t, testAPIPutObjectPartHandlerStreaming, []string{"NewMultipart", "PutObjectPart"})
}