Prefer xrange over range for small performance gain.

range() allocates an actual list when called.  xrange() is just an iterator
and creates the next range item on demand.  This provides a slight
performance increase.

In python 3, range will do what xrange does currently, but the upgrade will
be handled by the 2to3 tool.

(Bitbake rev: 73b40f06444cb877a5960b2aa66abf7dacbd88f0)

Signed-off-by: Bob Foerster <robert@erafx.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/lib/bb/utils.py

@@ -194,10 +194,10 @@ def vercmp_string(val1, val2):
     val2 = val2[0].split('.')
 
     # add back decimal point so that .03 does not become "3" !
-    for x in range(1, len(val1)):
+    for x in xrange(1, len(val1)):
         if val1[x][0] == '0' :
             val1[x] = '.' + val1[x]
-    for x in range(1, len(val2)):
+    for x in xrange(1, len(val2)):
         if val2[x][0] == '0' :
             val2[x] = '.' + val2[x]
 
@@ -214,10 +214,10 @@ def vercmp_string(val1, val2):
         val2[-1] += '_' + val2_prepart
     # The above code will extend version numbers out so they
     # have the same number of digits.
-    for x in range(0, len(val1)):
+    for x in xrange(0, len(val1)):
         cmp1 = relparse(val1[x])
         cmp2 = relparse(val2[x])
-        for y in range(0, 3):
+        for y in xrange(0, 3):
             myret = cmp1[y] - cmp2[y]
             if myret != 0:
                 __vercmp_cache__[valkey] = myret
@@ -308,7 +308,7 @@ def _print_trace(body, line):
     # print the environment of the method
     min_line = max(1, line-4)
     max_line = min(line + 4, len(body))
-    for i in range(min_line, max_line + 1):
+    for i in xrange(min_line, max_line + 1):
         if line == i:
             logger.error(" *** %.4d:%s" % (i, body[i-1]) )
         else: