Optimizing Data Merging in Clay: Tips for LinkedIn and Snowflake Integration

Hi, I was experimenting with a LinkedIn database download and matching that with (find people) results in Clay. I feel that the "Lookup other row" operation is very slow for big tables (can take hours to run through on big tables). Are there any other options to merging those data points in Clay? Or even best practices if one should rather try to directly connect with the Snowflake database?