bevy/release-content/migration-guides/remove_deprecated_batch_spawning.md

title	pull_requests
Removed Deprecated Batch Spawning Methods	18148

The following deprecated functions have been removed:

• Commands::insert_or_spawn_batch
• World::insert_or_spawn_batch
• World::insert_or_spawn_batch_with_caller

These functions, when used incorrectly, could cause major performance problems and were generally viewed as anti-patterns and foot guns. They were deprecated in 0.16 for being unnecessary with the retained render world and easily misused.

Instead of these functions consider doing one of the following:

Option A) Instead of despawning entities, insert the Disabled component, and instead of respawning them at particular ids, use try_insert_batch or insert_batch and remove Disabled.

Option B) Instead of giving special meaning to an entity id, simply use spawn_batch and ensure entity references are valid when despawning.