Merge c4cd929197 into 8fd32978b4

addons/observers.luau

@@ -4,15 +4,15 @@ export type PatchedWorld = jecs.World & {
 	added: <T>(PatchedWorld, jecs.Id<T>, (e: jecs.Entity, id: jecs.Id, value: T) -> ()) -> () -> (),
 	removed: <T>(PatchedWorld, jecs.Id<T>, (e: jecs.Entity, id: jecs.Id) -> ()) -> () -> (),
 	changed: <T>(PatchedWorld, jecs.Id<T>, (e: jecs.Entity, id: jecs.Id, value: T) -> ()) -> () -> (),
-	observer: <T...>(
+	observer: (
 		PatchedWorld,
-		jecs.Query<T...>,
-		(<a>(jecs.Entity, jecs.Id<a>, a) -> ())?
-	) -> () -> (jecs.Entity),
+		any,
+		(jecs.Entity) -> ()
+	) -> (),
 	monitor: (
 		PatchedWorld,
 		any,
-		(<a>(jecs.Entity, jecs.Id<a>) -> ())?
+		(jecs.Entity, jecs.Id) -> ()
 	) -> ()
 }
 
@@ -25,8 +25,6 @@ local function observers_new(world, query, callback)
 	end
 
 	local entity_index = world.entity_index :: any
-	local i = 0
-	local entities = {}
 	local function emplaced(entity, id, value)
 		local r = jecs.entity_index_try_get_fast(
 			entity_index, entity :: any)
@@ -38,11 +36,7 @@ local function observers_new(world, query, callback)
 		local archetype = r.archetype
 
 		if jecs.query_match(query, archetype) then
-			i += 1
-			entities[i] = entity
-			if callback ~= nil then
-				callback(entity, id, value)
-			end
+			callback(entity)
 		end
 	end
 
@@ -50,19 +44,6 @@ local function observers_new(world, query, callback)
 		world:added(term, emplaced)
 		world:changed(term, emplaced)
  	end
-
-  	return function()
-  		local row = i
-  		return function()
-     			if row == 0 then
-         			i = 0
-          		table.clear(entities)
-      		end
-           	local entity = entities[row]
-           	row -= 1
-           	return entity
-		end
-    end
 end
 
 local function join(world, component)
@@ -118,9 +99,7 @@ local function monitors_new(world, query, callback)
 	end
 
 	local entity_index = world.entity_index :: any
-	local i = 0
-	local entities = {}
-	local function emplaced(entity, id, value)
+	local function emplaced(entity: jecs.Entity)
 		local r = jecs.entity_index_try_get_fast(
 			entity_index, entity :: any)
 
@@ -131,17 +110,22 @@ local function monitors_new(world, query, callback)
 		local archetype = r.archetype
 
 		if jecs.query_match(query, archetype) then
-			i += 1
-			entities[i] = entity
-			if callback ~= nil then
-				callback(entity, id, value)
-			end
+			callback(entity, jecs.OnAdd)
 		end
 	end
 
 	local function removed(entity: jecs.Entity, component: jecs.Id)
-		local EcsOnRemove = jecs.OnRemove :: jecs.Id
-		if callback ~= nil then
+		local r = jecs.entity_index_try_get_fast(
+			entity_index, entity :: any)
+
+		if not r then
+			return
+		end
+
+		local archetype = r.archetype
+
+		if jecs.query_match(query, archetype) then
+			local EcsOnRemove = jecs.OnRemove :: jecs.Id
 			callback(entity, EcsOnRemove)
 		end
 	end
@@ -150,19 +134,6 @@ local function monitors_new(world, query, callback)
 		world:added(term, emplaced)
 		world:removed(term, removed)
  	end
-
-	return function()
-		local row = i
-		return function()
-			if row == 0 then
-				i = 0
-				table.clear(entities)
-			end
-			local entity = entities[row]
-			row -= 1
-			return entity
-		end
-	end
 end
 
 local function observers_add(world: jecs.World): PatchedWorld
@@ -198,7 +169,7 @@ local function observers_add(world: jecs.World): PatchedWorld
 
 			local idr = world.component_index[component]
 			if idr then
-				idr.on_add = on_add
+				idr.hooks.on_add = on_add
 			else
 				world:set(component, jecs.OnAdd, on_add)
 			end
@@ -232,7 +203,7 @@ local function observers_add(world: jecs.World): PatchedWorld
 			end
 			local idr = world.component_index[component]
 			if idr then
-				idr.on_change = on_change
+				idr.hooks.on_change = on_change
 			else
 				world:set(component, jecs.OnChange, on_change)
 			end
@@ -267,7 +238,7 @@ local function observers_add(world: jecs.World): PatchedWorld
 
 			local idr = world.component_index[component]
 			if idr then
-				idr.on_remove = on_remove
+				idr.hooks.on_remove = on_remove
 			else
 				world:set(component, jecs.OnRemove, on_remove)
 			end

jecs.d.ts

@@ -310,7 +310,6 @@ export declare const OnDeleteTarget: Tag;
 export declare const Delete: Tag;
 export declare const Remove: Tag;
 export declare const Name: Entity<string>;
-export declare const Exclusive: Tag;
 export declare const Rest: Entity;
 
 export type ComponentRecord = {

jecs.luau

@@ -42,12 +42,14 @@ export type Iter<T...> = (query: Query<T...>) -> () -> (Entity, T...)
 export type Query<T...> = typeof(setmetatable(
 	{} :: {
 		iter: Iter<T...>,
-		with: (<a>(Query<T...>, Id<a>) -> Query<T...>)
+		with:
+			(<a>(Query<T...>, Id<a>) -> Query<T...>)
 			& (<a, b>(Query<T...>, Id<a>, Id<b>) -> Query<T...>)
 			& (<a, b, c>(Query<T...>, Id<a>, Id<b>, Id<c>) -> Query<T...>)
 			& (<a, b, c>(Query<T...>, Id<a>, Id<b>, Id<c>) -> Query<T...>)
 			& (<a, b, c, d>(Query<T...>, Id<a>, Id<b>, Id<c>, Id) -> Query<T...>),
-		without: (<a>(Query<T...>, Id<a>) -> Query<T...>)
+		without:
+			(<a>(Query<T...>, Id<a>) -> Query<T...>)
 			& (<a, b>(Query<T...>, Id<a>, Id<b>) -> Query<T...>)
 			& (<a, b, c>(Query<T...>, Id<a>, Id<b>, Id<c>) -> Query<T...>)
 			& (<a, b, c>(Query<T...>, Id<a>, Id<b>, Id<c>) -> Query<T...>)
@@ -170,10 +172,11 @@ export type ComponentRecord = {
 	counts: { [Id]: number },
 	flags: number,
 	size: number,
-
-	on_add: (<T>(entity: Entity, id: Entity<T>, value: T?) -> ())?,
-	on_change: (<T>(entity: Entity, id: Entity<T>, value: T) -> ())?,
-	on_remove: ((entity: Entity, id: Entity) -> ())?,
+	hooks: {
+		on_add: (<T>(entity: Entity, id: Entity<T>, value: T?) -> ())?,
+		on_change: (<T>(entity: Entity, id: Entity<T>, value: T) -> ())?,
+		on_remove: ((entity: Entity, id: Entity) -> ())?,
+	},
 }
 export type ComponentIndex = Map<Id, ComponentRecord>
 export type Archetypes = { [Id]: Archetype }
@@ -193,10 +196,10 @@ local ECS_ENTITY_MASK =       bit32.lshift(1, 24)
 local ECS_GENERATION_MASK =   bit32.lshift(1, 16)
 local ECS_PAIR_OFFSET = 	                 2^48
 
-local ECS_ID_DELETE =                 	   0b0001
-local ECS_ID_IS_TAG =                 	   0b0010
-local ECS_ID_IS_EXCLUSIVE =                0b0100
-local ECS_ID_MASK =                   	   0b0000
+local ECS_ID_DELETE =                 	     0b0001
+local ECS_ID_IS_TAG =                 	     0b0010
+local ECS_ID_IS_EXCLUSIVE =                  0b0100
+local ECS_ID_MASK =                   	     0b0000
 
 local HI_COMPONENT_ID =                       256
 local EcsOnAdd =             HI_COMPONENT_ID +  1
@@ -745,10 +748,11 @@ local function id_record_ensure(world: World, id: Entity): ComponentRecord
 		records = {},
 		counts = {},
 		flags = flags,
-
-		on_add = on_add,
-		on_change = on_change,
-		on_remove = on_remove,
+		hooks = {
+			on_add = on_add,
+			on_change = on_change,
+			on_remove = on_remove,
+		},
 	} :: ComponentRecord
 
 	component_index[id] = idr
@@ -1027,7 +1031,7 @@ local function archetype_delete(world: World, archetype: Archetype, row: number)
 
 	for _, id in id_types do
 		local idr = component_index[id]
-		local on_remove = idr.on_remove
+		local on_remove = idr.hooks.on_remove
 		if on_remove then
 			on_remove(delete, id)
 		end
@@ -1061,13 +1065,6 @@ local function archetype_destroy(world: World, archetype: Archetype)
 	local columns_map = archetype.columns_map
 
 	for id in columns_map do
-		local idr = component_index[id]
-		idr.records[archetype_id] = nil :: any
-		idr.counts[archetype_id] = nil
-		idr.size -= 1
-		if idr.size == 0 then
-			component_index[id] = nil :: any
-		end
 		local observer_list = find_observers(world, EcsOnArchetypeDelete, id)
 		if not observer_list then
 			continue
@@ -1078,6 +1075,16 @@ local function archetype_destroy(world: World, archetype: Archetype)
 			end
 		end
 	end
+
+	for id in columns_map do
+		local idr = component_index[id]
+		idr.records[archetype_id] = nil :: any
+		idr.counts[archetype_id] = nil
+		idr.size -= 1
+		if idr.size == 0 then
+			component_index[id] = nil :: any
+		end
+	end
 end
 
 local function NOOP() end
@@ -2023,7 +2030,7 @@ local function ecs_bulk_insert(world: World, entity: Entity, ids: { Entity }, va
 			local value = values[i]
 			local cdr = component_index[id]
 
-			local on_add = cdr.on_add
+			local on_add = cdr.hooks.on_add
 			if value then
 				columns_map[id][row] = value
 				if on_add then
@@ -2068,11 +2075,11 @@ local function ecs_bulk_insert(world: World, entity: Entity, ids: { Entity }, va
 
 		local value = values[i] :: any
 
-		local on_add = idr.on_add
+		local on_add = idr.hooks.on_add
 
 		if value ~= nil then
 			columns_map[id][row] = value
-			local on_change = idr.on_change
+			local on_change = idr.hooks.on_change
 			local hook = if set then on_change else on_add
 			if hook then
 				hook(entity, id, value :: any)
@@ -2107,7 +2114,7 @@ local function ecs_bulk_remove(world: World, entity: Entity, ids: { Entity })
 	    remove[id] = true
 		local idr = component_index[id]
 
-		local on_remove = idr.on_remove
+		local on_remove = idr.hooks.on_remove
 		if on_remove then
 			on_remove(entity, id)
 		end
@@ -2181,76 +2188,6 @@ local function world_new()
 		return r
 	end
 
-	local function inner_archetype_move(
-		entity: Entity,
-		to: Archetype,
-		dst_row: i24,
-		from: Archetype,
-		src_row: i24
-	)
-		local src_columns = from.columns
-		local dst_entities = to.entities
-		local src_entities = from.entities
-
-		local last = #src_entities
-		local id_types = from.types
-		local columns_map = to.columns_map
-
-		if src_row ~= last then
-			for i, column in src_columns do
-				if column == NULL_ARRAY then
-					continue
-				end
-				local dst_column = columns_map[id_types[i]]
-
-				if dst_column then
-					dst_column[dst_row] = column[src_row]
-				end
-
-				column[src_row] = column[last]
-				column[last] = nil
-			end
-
-			local e2 = src_entities[last]
-			src_entities[src_row] = e2
-
-			local record2 = eindex_sparse_array[ECS_ENTITY_T_LO(e2 :: number)]
-			record2.row = src_row
-		else
-			for i, column in src_columns do
-				if column == NULL_ARRAY then
-					continue
-				end
-				-- Retrieves the new column index from the source archetype's record from each component
-				-- We have to do this because the columns are tightly packed and indexes may not correspond to each other.
-				local dst_column = columns_map[id_types[i]]
-
-				-- Sometimes target column may not exist, e.g. when you remove a component.
-				if dst_column then
-					dst_column[dst_row] = column[src_row]
-				end
-
-				column[last] = nil
-			end
-		end
-		src_entities[last] = nil :: any
-		dst_entities[dst_row] = entity
-	end
-
-	local function inner_entity_move(
-		entity_index: EntityIndex,
-		entity: Entity,
-		record: Record,
-		to: Archetype
-	)
-		local sourceRow = record.row
-		local from = record.archetype
-		local dst_row = archetype_append(entity, to)
-		inner_archetype_move(entity, to, dst_row, from, sourceRow)
-		record.archetype = to
-		record.row = dst_row
-	end
-
 	-- local function inner_entity_index_try_get(entity: number): Record?
 	-- 	local r = inner_entity_index_try_get_any(entity)
 	-- 	if r then
@@ -2303,7 +2240,7 @@ local function world_new()
 				if idr and bit32.btest(idr.flags, ECS_ID_IS_EXCLUSIVE) then
 					local cr = idr.records[src.id]
 					if cr then
-						local on_remove = idr.on_remove
+						local on_remove = idr.hooks.on_remove
 						local id_types = src.types
 						if on_remove then
 							on_remove(entity, id_types[cr])
@@ -2330,14 +2267,14 @@ local function world_new()
 				return
 			end
 			if from then
-				inner_entity_move(entity_index, entity, record, to)
+				entity_move(entity_index, entity, record, to)
 			else
 				if #to.types > 0 then
 					new_entity(entity, record, to)
 				end
 			end
 
-			local on_add = idr.on_add
+			local on_add = idr.hooks.on_add
 
 			if on_add then
 				on_add(entity, id)
@@ -2349,7 +2286,7 @@ local function world_new()
 			return
 		end
 		if from then
-			inner_entity_move(entity_index, entity, record, to)
+			entity_move(entity_index, entity, record, to)
 		else
 			if #to.types > 0 then
 				new_entity(entity, record, to)
@@ -2357,7 +2294,7 @@ local function world_new()
 		end
 
 		local idr = component_index[id]
-		local on_add = idr.on_add
+		local on_add = idr.hooks.on_add
 
 		if on_add then
 			on_add(entity, id)
@@ -2485,73 +2422,104 @@ local function world_new()
 		end
 
 		local from: Archetype = record.archetype
-		local src = from or ROOT_ARCHETYPE
-		local column = src.columns_map[id]
-		if column then
-			local idr = component_index[id]
-			column[record.row] = data
-
-			-- If the archetypes are the same it can avoid moving the entity
-			-- and just set the data directly.
-			local on_change = idr.on_change
-			if on_change then
-				on_change(entity, id, data)
-			end
-		else
-			local to: Archetype
+		if ECS_IS_PAIR(id::number) then
+			local src = from or ROOT_ARCHETYPE
+			local edge = archetype_edges[src.id]
+			local to = edge[id]
 			local idr: ComponentRecord
-			if ECS_IS_PAIR(id::number) then
-				local edge = archetype_edges[src.id]
-				to = edge[id]
-				if not to then
-					local first = ECS_PAIR_FIRST(id::number)
-					local wc = ECS_PAIR(first, EcsWildcard)
-					idr = component_index[wc]
-					if idr and bit32.btest(idr.flags, ECS_ID_IS_EXCLUSIVE) then
-						local cr = idr.records[src.id]
-						if cr then
-							local on_remove = idr.on_remove
-							local id_types = src.types
-							if on_remove then
-								on_remove(entity, id_types[cr])
-								src = record.archetype
-								id_types = src.types
-								cr = idr.records[src.id]
-							end
-							local dst = table.clone(id_types)
-							dst[cr] = id
-							to = archetype_ensure(world, dst)
-						else
-							to = find_archetype_with(world, id, src)
-							idr = component_index[id]
+			if not to then
+				local first = ECS_PAIR_FIRST(id::number)
+				local wc = ECS_PAIR(first, EcsWildcard)
+				idr = component_index[wc]
+				if idr and bit32.btest(idr.flags, ECS_ID_IS_EXCLUSIVE) then
+					local cr = idr.records[src.id]
+					if cr then
+						local on_remove = idr.hooks.on_remove
+						local id_types = src.types
+						if on_remove then
+							on_remove(entity, id_types[cr])
+							src = record.archetype
+							id_types = src.types
+							cr = idr.records[src.id]
 						end
+						local dst = table.clone(id_types)
+						dst[cr] = id
+						to = archetype_ensure(world, dst)
 					else
 						to = find_archetype_with(world, id, src)
 						idr = component_index[id]
 					end
-					edge[id] = to
 				else
+					to = find_archetype_with(world, id, src)
 					idr = component_index[id]
 				end
+				edge[id] = to
 			else
-				to = inner_archetype_traverse_add(id, from)
 				idr = component_index[id]
 			end
+			local idr_hooks = idr.hooks
+			if from == to then
+				local column = to.columns_map[id]
+				column[record.row] = data
+
+				-- If the archetypes are the same it can avoid moving the entity
+				-- and just set the data directly.
+				local on_change = idr_hooks.on_change
+				if on_change then
+					on_change(entity, id, data)
+				end
+
+				return
+			end
 
 			if from then
-				-- If there was a previous archetype, then the entity needs to move the archetype
-				inner_entity_move(entity_index, entity, record, to)
+				entity_move(entity_index, entity, record, to)
 			else
-				new_entity(entity, record, to)
+				if #to.types > 0 then
+					new_entity(entity, record, to)
+				end
 			end
 
-			column = to.columns_map[id]
+			local column = to.columns_map[id]
 			column[record.row] = data
 
-			local on_add = idr.on_add
+			local on_add = idr.hooks.on_add
+
 			if on_add then
-				on_add(entity, id, data)
+				on_add(entity, id)
 			end
+			return
+		end
+		local to: Archetype = inner_archetype_traverse_add(id, from)
+		local idr = component_index[id]
+		local idr_hooks = idr.hooks
+
+		if from == to then
+			local column = to.columns_map[id]
+			column[record.row] = data
+
+			-- If the archetypes are the same it can avoid moving the entity
+			-- and just set the data directly.
+			local on_change = idr_hooks.on_change
+			if on_change then
+				on_change(entity, id, data)
+			end
+
+			return
+		end
+
+		if from then
+			-- If there was a previous archetype, then the entity needs to move the archetype
+			entity_move(entity_index, entity, record, to)
+		else
+			new_entity(entity, record, to)
+		end
+		local column = to.columns_map[id]
+		column[record.row] = data
+
+		local on_add = idr_hooks.on_add
+		if on_add then
+			on_add(entity, id, data)
 		end
 	end
 
@@ -2629,14 +2597,14 @@ local function world_new()
 
 		if from.columns_map[id] then
 			local idr = world.component_index[id]
-			local on_remove = idr.on_remove
+			local on_remove = idr.hooks.on_remove
 			if on_remove then
 				on_remove(entity, id)
 			end
 
 			local to = archetype_traverse_remove(world, id, record.archetype)
 
-			inner_entity_move(entity_index, entity, record, to)
+			entity_move(entity_index, entity, record, to)
 		end
 	end
 
@@ -2663,13 +2631,16 @@ local function world_new()
 		end
 
 		if idr_t then
+			local queue: { i53 }
+			local ids: Map<i53, boolean>
+
+			local count = 0
 			local archetype_ids = idr_t.records
 			for archetype_id in archetype_ids do
 				local idr_t_archetype = archetypes[archetype_id]
 				local idr_t_types = idr_t_archetype.types
 				local entities = idr_t_archetype.entities
-
-				local node = idr_t_archetype
+				local removal_queued = false
 
 				for _, id in idr_t_types do
 					if not ECS_IS_PAIR(id::number) then
@@ -2680,48 +2651,57 @@ local function world_new()
 					if object ~= entity then
 						continue
 					end
-					node = archetype_traverse_remove(world, id, node)
-					local on_remove = component_index[id].on_remove
-					if on_remove then
-						for _, entity in entities do
-							on_remove(entity, id)
-						end
+					if not ids then
+						ids = {} :: { [i53]: boolean }
 					end
+					ids[id] = true
+					removal_queued = true
 				end
 
-				for i = #entities, 1, -1 do
-					local e = entities[i]
-					local r = inner_entity_index_try_get_unsafe(e::number) :: Record
-					inner_entity_move(entity_index, e, r, node)
+				if not removal_queued then
+					continue
+				end
+
+				if not queue then
+					queue = {} :: { i53 }
+				end
+
+				local n = #entities
+				table.move(entities, 1, n, count + 1, queue)
+				count += n
+			end
+
+			for id in ids do
+				for _, child in queue do
+					inner_world_remove(world, child, id)
 				end
 			end
 		end
 
 		if idr_r then
+			local count = 0
 			local archetype_ids = idr_r.records
+			local ids = {}
+			local queue = {}
 			local records = idr_r.records
 			local counts = idr_r.counts
 			for archetype_id in archetype_ids do
 				local idr_r_archetype = archetypes[archetype_id]
-				local node = idr_r_archetype
 				local entities = idr_r_archetype.entities
 				local tr = records[archetype_id]
 				local tr_count = counts[archetype_id]
 				local types = idr_r_archetype.types
 				for i = tr, tr + tr_count - 1 do
-					local id = types[i]
-					node = archetype_traverse_remove(world, id, idr_r_archetype)
-					local on_remove = component_index[id].on_remove
-					if on_remove then
-						for _, entity in entities do
-							on_remove(entity, id)
-						end
-					end
+					ids[types[i]] = true
 				end
-				for i = #entities, 1, -1 do
-					local e = entities[i]
-					local r = inner_entity_index_try_get_unsafe(e::number) :: Record
-					inner_entity_move(entity_index, e, r, node)
+				local n = #entities
+				table.move(entities, 1, n, count + 1, queue)
+				count += n
+			end
+
+			for _, e in queue do
+				for id in ids do
+					inner_world_remove(world, e, id)
 				end
 			end
 		end
@@ -2767,7 +2747,7 @@ local function world_new()
 					archetype_destroy(world, idr_archetype)
 				end
 			else
-				local on_remove = idr.on_remove
+				local on_remove = idr.hooks.on_remove
 				if on_remove then
 					for archetype_id in idr.records do
 						local idr_archetype = archetypes[archetype_id]
@@ -2784,7 +2764,7 @@ local function world_new()
 								-- this is hypothetically not that expensive of an operation anyways
 								to = archetype_traverse_remove(world, entity, from)
 							end
-							inner_entity_move(entity_index, e, r, to)
+							entity_move(entity_index, e, r, to)
 						end
 
 						archetype_destroy(world, idr_archetype)
@@ -2805,15 +2785,19 @@ local function world_new()
 				end
 			end
 		end
+
 		if idr_t then
+			local children: { i53 }
+			local ids: Map<i53, boolean>
+
+			local count = 0
 			local archetype_ids = idr_t.records
 			for archetype_id in archetype_ids do
 				local idr_t_archetype = archetypes[archetype_id]
-				local node = idr_t_archetype
 				local idr_t_types = idr_t_archetype.types
 				local entities = idr_t_archetype.entities
+				local removal_queued = false
 
-				local deleted = false
 				for _, id in idr_t_types do
 					if not ECS_IS_PAIR(id::number) then
 						continue
@@ -2831,24 +2815,31 @@ local function world_new()
 							local child = entities[i]
 							inner_world_delete(world, child)
 						end
-						deleted = true
 						break
 					else
-						node = archetype_traverse_remove(world, id, node)
-						local on_remove = component_index[id].on_remove
-						if on_remove then
-							for _, entity in entities do
-								on_remove(entity, id)
-							end
+						if not ids then
+							ids = {} :: { [i53]: boolean }
 						end
+						ids[id] = true
+						removal_queued = true
 					end
 				end
 
-				if not deleted then
-					for i = #entities, 1, -1 do
-						local e = entities[i]
-						local r = inner_entity_index_try_get_unsafe(e::number) :: Record
-						inner_entity_move(entity_index, e, r, node)
+				if not removal_queued then
+					continue
+				end
+				if not children then
+					children = {} :: { i53 }
+				end
+				local n = #entities
+				table.move(entities, 1, n, count + 1, children)
+				count += n
+			end
+
+			if ids then
+				for _, child in children do
+					for id in ids do
+						inner_world_remove(world, child, id)
 					end
 				end
 			end
@@ -2872,29 +2863,28 @@ local function world_new()
 					archetype_destroy(world, idr_r_archetype)
 				end
 			else
+				local children = {}
+				local count = 0
+				local ids = {}
 				local counts = idr_r.counts
 				local records = idr_r.records
 				for archetype_id in archetype_ids do
 					local idr_r_archetype = archetypes[archetype_id]
-					local node = idr_r_archetype
 					local entities = idr_r_archetype.entities
 					local tr = records[archetype_id]
 					local tr_count = counts[archetype_id]
 					local types = idr_r_archetype.types
 					for i = tr, tr + tr_count - 1 do
-						local id = types[i]
-						node = archetype_traverse_remove(world, id, node)
-						local on_remove = component_index[id].on_remove
-						if on_remove then
-							for _, entity in entities do
-								on_remove(entity, id)
-							end
-						end
+						ids[types[i]] = true
 					end
-					for i = #entities, 1, -1 do
-						local e = entities[i]
-						local r = inner_entity_index_try_get_unsafe(e::number) :: Record
-						inner_entity_move(entity_index, e, r, node)
+
+					local n = #entities
+					table.move(entities, 1, n, count + 1, children)
+					count += n
+				end
+				for _, child in children do
+					for id in ids do
+						inner_world_remove(world, child, id)
 					end
 				end
 

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@rbxts/jecs",
-	"version": "0.8.1",
+	"version": "0.7.3",
 	"description": "Stupidly fast Entity Component System",
 	"main": "jecs.luau",
 	"repository": {

wally.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ukendio/jecs"
-version = "0.8.1"
+version = "0.7.3"
 registry = "https://github.com/UpliftGames/wally-index"
 realm = "shared"
 license = "MIT"