perf: harden runtime for weaker hardware

world/combat/HostileCombatant.gd

@@ -5,6 +5,7 @@ var combatant: CombatantStateRecord
 var simulation_manager: Node
 var _flash_tween: Tween
 var _spawn_tween: Tween
+var _last_health := 0.0
 
 
 func _ready() -> void:
@@ -24,22 +25,21 @@ func bind(combatant_id_value: StringName, manager: Node) -> void:
 	global_position = combatant.get_position()
 	sim_position = combatant.get_position()
 	_build_from_definition()
+	_last_health = combatant.get_health()
 	combatant.changed.connect(_on_combatant_changed)
 
 
-func _process(_delta: float) -> void:
+func _on_combatant_changed(_state: CombatantStateRecord) -> void:
 	if is_dead_visual or combatant == null or not is_instance_valid(combatant):
 		return
 	if not combatant.is_alive():
 		play_death()
 		return
 	set_sim_position(combatant.get_position())
-
-
-func _on_combatant_changed(_state: CombatantStateRecord) -> void:
-	if combatant == null or combatant.get_health() >= combatant.get_max_health():
-		return
-	_flash_hit()
+	var current_health := combatant.get_health()
+	if current_health < _last_health:
+		_flash_hit()
+	_last_health = current_health
 
 
 func _flash_hit() -> void:
@@ -51,6 +51,8 @@ func _flash_hit() -> void:
 
 
 func play_death() -> void:
+	if is_dead_visual:
+		return
 	is_dead_visual = true
 	super.play_death()