Bulk-import large JSON into Core Data efficiently
Source: interviewadvanced
WHAT IT TESTS: knowing the batch APIs. OUTLINE: use NSBatchInsertRequest to write rows directly to the store, bypassing context object materialization, for huge memory and speed wins; limitation is it skips validation, relationships, and does not notify…
WHAT IT TESTS: whether you know the specialized batch operations that bypass the managed object graph. ANSWER OUTLINE: NSBatchInsertRequest writes records straight to the persistent store using dictionaries or a handler, never materializing NSManagedObjects, so memory stays flat and import is far faster than a save loop; run it on a background context.
Read the original → interview
- #ios
- #core-data
- #performance
- #batch-insert
- #import
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