Make hb-diff faster

diff --git a/test/shaping/hb_test_tools.py b/test/shaping/hb_test_tools.py
index 94207f8..d85c38e 100644 (file)
--- a/test/shaping/hb_test_tools.py
+++ b/test/shaping/hb_test_tools.py
@@ -1,6 +1,7 @@
 #!/usr/bin/python
 
 import sys, os, re, difflib, unicodedata, errno
+from itertools import *
 
 class Colors:
        class Null:
@@ -91,7 +92,7 @@ class FancyDiffer:
        @staticmethod
        def diff_files (f1, f2, colors=Colors.Null):
                try:
-                       for (l1,l2) in zip (f1, f2):
+                       for (l1,l2) in izip (f1, f2):
                                if l1 == l2:
                                        sys.stdout.writelines ([" ", l1])
                                        continue
@@ -100,7 +101,7 @@ class FancyDiffer:
                        # print out residues
                        for l in f1:
                                sys.stdout.writelines (["-", colors.red, l, colors.end])
-                       for l in f1:
+                       for l in f2:
                                sys.stdout.writelines (["-", colors.green, l, colors.end])
                except IOError as e:
                        if e.errno != errno.EPIPE:
@@ -114,6 +115,7 @@ class DiffFilters:
        def filter_failures (f):
                for l in f:
                        if l[0] in '-+':
+                               # TODO retain all lines of the failure
                                yield l