Yes, there is a cold start penalty but once the data is cached, it is equivalent to disk backed indices. There is also active work being done to improve the per

Yes, there is a cold start penalty but once the data is cached, it is equivalent to disk backed indices. There is also active work being done to improve the performance, example https://github.com/opensearch-project/OpenSearch/issues/13806 https://github.com/opensearch-project/OpenSearch/issues/1380...