glTF importer: more perf

1 files changed, 10 insertions, 12 deletions

diff --git a/io_scene_gltf2/io/imp/gltf2_io_binary.py b/io_scene_gltf2/io/imp/gltf2_io_binary.py
index f7a101df..4c5ea8f1 100755
--- a/io_scene_gltf2/io/imp/gltf2_io_binary.py
+++ b/io_scene_gltf2/io/imp/gltf2_io_binary.py
@@ -67,12 +67,11 @@ class BinaryData():
         else:
             stride = stride_
 
-        data = []
-        offset = 0
-        while len(data) < accessor.count:
-            element = struct.unpack_from(fmt, buffer_data, offset)
-            data.append(element)
-            offset += stride
+        unpack_from = struct.Struct(fmt).unpack_from
+        data = [
+            unpack_from(buffer_data, offset)
+            for offset in range(0, accessor.count*stride, stride)
+        ]
 
         if accessor.sparse:
             sparse_indices_data = BinaryData.get_data_from_sparse(gltf, accessor.sparse, "indices")
@@ -142,12 +141,11 @@ class BinaryData():
         else:
             stride = stride_
 
-        data = []
-        offset = 0
-        while len(data) < sparse.count:
-            element = struct.unpack_from(fmt, bin_data, offset)
-            data.append(element)
-            offset += stride
+        unpack_from = struct.Struct(fmt).unpack_from
+        data = [
+            unpack_from(bin_data, offset)
+            for offset in range(0, sparse.count*stride, stride)
+        ]
 
         return data