Low perfomance with ipfs-cluster

Hello, there is such a problem. We write files to IPFS in 200 streams, each file is ~10mb. When using Kubo, the delay is up to 1 second and everything is fine. If we use an IPFS Cluster directed at the same Kubo node, we get a delay of up to 30 seconds for 1 file. We plan to use it as a distribution of files across the cluster. We do not have a replication task.
Question: Is the IPFS Cluster not capable of handling such a load? Or do we have a configuration error? Replications are set to 0. The connection protocol is Ip2p. Configuration, 1 IPFS Cluster node and 1 IPFS node.
Server: 256Gb RAM, CPU 64, NVME

How are you writing to Kubo/Cluster? What are the request options that you are using?