Only print timing info in debug mode

src/calibre/gui2/tweak_book/reports.py

@@ -6,6 +6,7 @@ from __future__ import (unicode_literals, division, absolute_import,
 __license__ = 'GPL v3'
 __copyright__ = '2015, Kovid Goyal <kovid at kovidgoyal.net>'
 
+import time
 from threading import Thread
 from future_builtins import map
 from operator import itemgetter
@@ -24,6 +25,7 @@ from PyQt5.Qt import (
     QFontDatabase, QComboBox)
 
 from calibre import human_readable, fit_image
+from calibre.constants import DEBUG
 from calibre.ebooks.oeb.polish.report import gather_data, CSSEntry, CSSFileMatch, MatchLocation
 from calibre.gui2 import error_dialog, question_dialog, choose_save_file
 from calibre.gui2.tweak_book import current_container, tprefs, dictionaries
@@ -944,7 +946,11 @@ class ReportsWidget(QWidget):
     def __call__(self, data):
         jump.clear()
         for i in xrange(self.stack.count()):
+            st = time.time()
             self.stack.widget(i)(data)
+            if DEBUG:
+                category = self.reports.item(i).data(Qt.DisplayRole)
+                print ('Widget time for %12s: %.2fs seconds' % (category, time.time() - st))
 
     def save(self):
         save_state('splitter-state', bytearray(self.splitter.saveState()))
@@ -1042,11 +1048,9 @@ class Reports(Dialog):
                 'Failed to gather data for the report. Click "Show details" for more'
                 ' information.'), det_msg=data, show=True)
         data, timing = data
-        try:
+        if DEBUG:
             for x, t in sorted(timing.iteritems(), key=itemgetter(1)):
                 print ('Time for %6s data: %.3f seconds' % (x, t))
-        except Exception:
-            pass
         self.reports(data)
 
     def accept(self):