Speed Up Writes with bulk_create and bulk_update

Saving objects one by one in a loop is a performance bottleneck. Use `bulk_create()` to insert a list of objects in a single query, and `bulk_update()` to update specific fields on existing objects efficiently.

Scenario 1: Bulk Create

Insert 5,000 records in one go.

python

entries = [Entry(headline=f"Post {i}") for i in range(5000)]
# Hits the DB once
Entry.objects.bulk_create(entries)

Scenario 2: Bulk Update

Update specific fields for a list of objects.

python

products_to_update = []
for p in Product.objects.all():
    p.price = p.price * 1.1  # 10% increase
    products_to_update.append(p)

# Only updates the 'price' column for all items in the list
Product.objects.bulk_update(products_to_update, ['price'])