latency impact when using the open search personalization plugin

I see this open search to personalize plugin based integration - https://docs.aws.amazon.com/personalize/latest/dg/personalize-opensearch.html

Want to understand the latency impact when using the open search personalization plugin ?

1. What will be the latency for the search without the plugin ?
2. What will be the latency for the seach with the plugin ?