From fc7566b2d83eb5b73aa516b045116e02150df83c Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 10 Sep 2017 15:19:40 +0300
Subject: [PATCH] Small optimization for mesh exporter performance

---
 blender/io_mspgl/export_mesh.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/blender/io_mspgl/export_mesh.py b/blender/io_mspgl/export_mesh.py
index c37d60ca..541874b2 100644
--- a/blender/io_mspgl/export_mesh.py
+++ b/blender/io_mspgl/export_mesh.py
@@ -64,6 +64,7 @@ class MeshExporter:
 			cache = VertexCache(self.cache_size)
 
 		island = []
+		face_neighbors = []
 		island_strips = []
 		while 1:
 			if not island:
@@ -88,6 +89,8 @@ class MeshExporter:
 							n.flag = True
 							queue.append(n)
 
+				face_neighbors = [f.get_neighbors() for f in island]
+
 				# Unflag the island for the next phase
 				for f in island:
 					f.flag = False
@@ -97,11 +100,11 @@ class MeshExporter:
 			# or along borders of a non-closed island.
 			best = 5
 			face = None
-			for f in island:
+			for i, f in enumerate(island):
 				if f.flag:
 					continue
 
-				score = sum(not n.flag for n in f.get_neighbors())
+				score = sum(not n.flag for n in face_neighbors[i])
 				if score>0 and score<best:
 					face = f
 					best = score
-- 
2.43.0