writefile: remove SDNA last-hit, optimize DNA reconstruct

- Move last-hit index out of SDNA struct
  (allows for access by multiple threads).
- Replace O(n^2) search with hash lookup in DNA reconstruction.

1 files changed, 2 insertions, 7 deletions

diff --git a/source/blender/makesdna/DNA_sdna_types.h b/source/blender/makesdna/DNA_sdna_types.h
index 791aca77558..26ea5cd4e93 100644
--- a/source/blender/makesdna/DNA_sdna_types.h
+++ b/source/blender/makesdna/DNA_sdna_types.h
@@ -35,12 +35,12 @@
 #
 #
 typedef struct SDNA {
-	const char *data;			/* full copy of 'encoded' data */
+	const char *data;	/* full copy of 'encoded' data (when data_alloc is set, otherwise borrowed). */
 	int datalen;		/* length of data */
 	bool data_alloc;
 
 	int nr_names;		/* total number of struct members */
-	const char **names;		/* struct member names */
+	const char **names;	/* struct member names */
 
 	int pointerlen;		/* size of a pointer in bytes */
 
@@ -57,11 +57,6 @@ typedef struct SDNA {
 
 	struct GHash *structs_map; /* ghash for faster lookups,
 	                            * requires WITH_DNA_GHASH to be used for now */
-
-		/* wrong place for this really, its a simple
-		 * cache for findstruct_nr.
-		 */
-	int lastfind;
 } SDNA;
 
 #