Do not read multiple times

kapitan/resources.py

@@ -22,6 +22,7 @@
 
 import kapitan.cached as cached
 from kapitan import __file__ as kapitan_install_path
+from kapitan.inputs.kadet import Dict
 from kapitan.errors import CompileError, InventoryError, KapitanError
 from kapitan.inventory import Inventory, ReclassInventory, AVAILABLE_BACKENDS
 from kapitan.utils import PrettyDumper, deep_get, flatten_dict, render_jinja2_file, sha256_string
@@ -334,6 +335,13 @@ def get_inventory(inventory_path, ignore_class_not_found: bool = False) -> Inven
 
     cached.inv = inventory_backend
     cached.global_inv = cached.inv.inventory
+
+    # if we use forked processes, we need to load the inventory for kadet once 
+    # and pass it to the children, to avoid re-reading the inventory for each child
+    # TODO(adenaria): Improve to only do it for kadet
+    if cached.args.mp_method != "spawn":
+        cached.inventory_global_kadet = Dict(cached.global_inv)
+
     # migrate inventory to selected inventory backend
     if hasattr(cached.args, "migrate") and cached.args.migrate:
         inventory_backend.migrate()