IDManagement: Speedup ID unique name assignment by tracking used names/basenames/suffixes

An implementation of T73412, roughly as outlined there:

Track the names that are in use, as well as base names (before
numeric suffix) plus a bit map for each base name, indicating which
numeric suffixes are already used. This is done per-Main/Library,
per-object-type.

Timings (Windows, VS2022 Release build, AMD Ryzen 5950X):

- Scene with 10k cubes, Shift+D to duplicate them all: 8.7s -> 1.9s.
  Name map memory usage for resulting 20k objects: 4.3MB.
- Importing a 2.5GB .obj file of exported Blender 3.0 splash scene
  (24k objects), using the new C++ importer: 34.2s-> 22.0s. Name map
  memory usage for resulting scene: 8.6MB.
- Importing Disney Moana USD scene (almost half a million objects):
  56min -> 10min. Name map usage: ~100MB. Blender crashes later on
  when trying to render it, in the same place in both cases, but
  that's for another day.

Reviewed By: Bastien Montagne
Differential Revision: https://developer.blender.org/D14162

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/main.c b/source/blender/blenkernel/intern/main.c
index b9ed783fa8c..239aacf28d6 100644
--- a/source/blender/blenkernel/intern/main.c
+++ b/source/blender/blenkernel/intern/main.c
@@ -24,6 +24,7 @@
 #include "BKE_lib_query.h"
 #include "BKE_main.h"
 #include "BKE_main_idmap.h"
+#include "BKE_main_namemap.h"
 
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"
@@ -184,6 +185,10 @@ void BKE_main_free(Main *mainvar)
     BKE_main_idmap_destroy(mainvar->id_map);
   }
 
+  if (mainvar->name_map) {
+    BKE_main_namemap_destroy(&mainvar->name_map);
+  }
+
   BLI_spin_end((SpinLock *)mainvar->lock);
   MEM_freeN(mainvar->lock);
   MEM_freeN(mainvar);