advice to optimize some special scenes or queries

What should be done?

hello,i'm using ferret to replace mongodb,but i find it has some the same problem in mongodb.so i think ferret can do better than mongo,so that ferret may have more users from mongodb

the following environment is there are 20w rows in mongodb as postgresql as backend in Solid State Drive

1. the first is BulkWrite(https://www.mongodb.com/zh-cn/docs/drivers/go/current/crud/bulk/), when is bulkwirte 20w+ updates into ferret,it will cost several hours,even one day
2. the second one is stat,which is the Aggregate(https://www.mongodb.com/zh-cn/docs/drivers/go/current/crud/query/retrieve/#aggregation). i think it may be a index usage is relational db,so when the data is big,it will be very slowly,which exist in mongodb ,too,but it actually a bad experience
3. the third one is query performance(Find:https://www.mongodb.com/zh-cn/docs/drivers/go/current/crud/query/retrieve/#find-multiple-documents), when i wanna use $regex to search in ferret,it will cost a little long time

the above is my common situations in using mongodb or ferret,so i wish ferret can optimize them with the performance of relational db lke postgres,thank you in advance