Use namedtuples instead of dict, this should GREATELY lower the memory footprint

src/room.py

@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with Poezio.  If not, see <http://www.gnu.org/licenses/>.
 
-from text_buffer import TextBuffer
+from text_buffer import TextBuffer, Message
 from datetime import datetime
 from random import randrange
 from config import config
@@ -111,18 +111,10 @@ class Room(TextBuffer):
             color = self.do_highlight(txt, time, nickname)
         if time:                # History messages are colored to be distinguished
             color = theme.COLOR_INFORMATION_TEXT
-        time = time if time is not None else datetime.now()
+        time = time or datetime.now()
         nick_color = nick_color or user.color if user else None
-        message = {'txt': txt, 'colorized':colorized,
-                   'time':time}
-        if nickname:
-            message['nickname'] = nickname
-        if nick_color:
-            message['nick_color'] = nick_color
-        if color:
-            message['color'] = color
-        if user:
-            message['user'] = user
+        message = Message(txt=txt, colorized=colorized, nick_color=nick_color,
+                      time=time, nickname=nickname, color=color, user=user)
         # message = Message(txt, time, nickname, nick_color, color, colorized, user=user)
         while len(self.messages) > self.messages_nb_limit:
             self.messages.pop(0)

src/text_buffer.py

@@ -21,10 +21,14 @@ Define the TextBuffer class
 import logging
 log = logging.getLogger(__name__)
 
+import collections
+
 from datetime import datetime
 import theme
 from config import config
 
+Message = collections.namedtuple('Message', 'txt colorized nick_color time nickname color user')
+
 class TextBuffer(object):
     """
     This class just keep trace of messages, in a list with various
@@ -43,14 +47,8 @@ class TextBuffer(object):
     def add_message(self, txt, time=None, nickname=None, colorized=False, nick_color=None):
         color = theme.COLOR_NORMAL_TEXT if nickname is not None else theme.COLOR_INFORMATION_TEXT
         nick_color = nick_color
-        msg = {'txt': txt, 'colorized':colorized,
-               'time':time or datetime.now()}
-        if nickname:
-            msg['nickname'] = nickname
-        if nick_color:
-            msg['nick_color'] = nick_color
-        if color:
-            msg['color'] = color
+        msg = Message(txt=txt, colorized=colorized, nick_color=nick_color,
+                      time=time or datetime.now(), nickname=nickname, color=color, user=None)
         self.messages.append(msg)
         while len(self.messages) > self.messages_nb_limit:
             self.messages.pop(0)

src/windows.py

@@ -48,6 +48,9 @@ import theme
 import common
 import wcwidth
 import singleton
+import collections
+
+Line = collections.namedtuple('Line', 'text colorized text_offset text_color nickname_color time nickname')
 
 g_lock = Lock()
 
@@ -515,14 +518,14 @@ class TextWin(Win):
         if message is None:  # line separator
             self.built_lines.append(None)
             return 0
-        txt = message.get('txt')
+        txt = message.txt
         if not txt:
             return 0
         else:
             txt = txt.replace('\t', '    ')
         # length of the time
         offset = 9+len(theme.CHAR_TIME_LEFT[:1])+len(theme.CHAR_TIME_RIGHT[:1])
-        nickname = message.get('nickname')
+        nickname = message.nickname
         if nickname and len(nickname) >= 25:
             nick = nickname[:25]+'…'
         else:
@@ -533,18 +536,20 @@ class TextWin(Win):
         nb = 0
         while txt != '':
             (txt, cutted_txt) = cut_text(txt, self.width-offset-1)
-            l = {'colorized': message.get('colorized'),
-                 'text_offset':offset,
-                 'text_color':message.get('color'),
-                 'text': cutted_txt
-                    }
-            color = message.get('user').color if message.get('user') else message.get('nick_color')
-            if first and color:
-                l['nickname_color'] = color
             if first:
-                l['time'] = message.get('time').strftime("%H:%M:%S")
-                l['nickname'] = nick
-            self.built_lines.append(l)
+                color = message.user.color if message.user else message.nick_color
+            else:
+                color = None
+            if first:
+                time = message.time.strftime("%H:%M:%S")
+                nickname = nick
+            else:
+                time = None
+                nickname = None
+            self.built_lines.append(Line(text=cutted_txt, colorized=message.colorized,
+                                         text_offset=offset, text_color=message.color,
+                                         nickname_color=color, time=time,
+                                         nickname=nickname))
             nb += 1
             first = False
         while len(self.built_lines) > self.lines_nb_limit:
@@ -569,9 +574,9 @@ class TextWin(Win):
                 if line is None:
                     self.write_line_separator()
                 else:
-                    self.write_time(line.get('time'))
-                    self.write_nickname(line.get('nickname'), line.get('nickname_color'))
-                    self.write_text(y, line.get('text_offset'), line.get('text'), line.get('text_color'), line.get('colorized'))
+                    self.write_time(line.time)
+                    self.write_nickname(line.nickname, line.nickname_color)
+                    self.write_text(y, line.text_offset, line.text, line.text_color, line.colorized)
                 if y != self.height-1:
                     self.addstr('\n')
             self._refresh()