Avoid creating extra `relation` and `build_arel` in `_create_record` and `_update_record` (#29999)
Currently `_create_record` and `_update_record` in `Persistence` are creating extra `unscoped` and calling `build_arel` in the relation. But `compile_insert` and `compile_update` can be done without those expensive operation for `SelectManager` creation. So I moved the implementation to `Persistence` to avoid creating extra relation and refactored to avoid calling `build_arel`. https://gist.github.com/kamipo/8ed73d760112cfa5f6263c9413633419 Before: ``` Warming up -------------------------------------- _update_record 150.000 i/100ms Calculating ------------------------------------- _update_record 1.548k (±12.3%) i/s - 7.650k in 5.042603s ``` After: ``` Warming up -------------------------------------- _update_record 201.000 i/100ms Calculating ------------------------------------- _update_record 2.002k (±12.8%) i/s - 9.849k in 5.027681s ``` 30% faster for STI classes.
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