results, err := globalSiteReplicationSys.Netperf(ctx, duration)
	if err != nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(toAPIErrorCode(ctx, err)), r.URL)
		return
	}
	enc := json.NewEncoder(w)
	if err := enc.Encode(results); err != nil {
		return
	}
}

// ClientDevNullExtraTime - return extratime for last devnull
// [POST] /minio/admin/v3/speedtest/client/devnull/extratime

		{"enc-nothing", []int64{0}, mapCopy(metaWithSSEC)},
		{"enc-small-0", []int64{11}, mapCopy(metaWithSSEC)},
		{"enc-small-1", []int64{509}, mapCopy(metaWithSSEC)},
		{"enc-small-2", []int64{5 * oneMiB}, mapCopy(metaWithSSEC)},
		// cases 12-15: multipart part objects with encryption
		{"enc-mp-0", []int64{5 * oneMiB, 10}, mapCopy(metaWithSSEC)},
		{"enc-mp-1", []int64{5*oneMiB + 1, 10}, mapCopy(metaWithSSEC)},

		w.Header().Set("Content-Type", string(contentType))

		enc := expfmt.NewEncoder(w, contentType)
		for _, mf := range mfs {
			if err := enc.Encode(mf); err != nil {
				// client may disconnect for any reasons
				// we do not have to log this.
				return
			}
		}
		if closer, ok := enc.(expfmt.Closer); ok {
			closer.Close()
		}
	})
}

	if oi1.ContentType != oi2.ContentType {
		return replicateMetadata
	}

	if oi1.ContentEncoding != "" {
		enc, ok := oi2.Metadata[xhttp.ContentEncoding]
		if !ok {
			enc, ok = oi2.Metadata[strings.ToLower(xhttp.ContentEncoding)]
			if !ok {
				return replicateMetadata
			}
		}
		if strings.Join(enc, ",") != oi1.ContentEncoding {
			return replicateMetadata
		}
	}