diff --git a/IRCBot.py b/IRCBot.py
index 7d15cd4d..df8dce83 100644
--- a/IRCBot.py
+++ b/IRCBot.py
@@ -65,13 +65,33 @@ class Bot(object):
             if not next or time_left < next:
                 next = time_left
 
-        return next if not next == None and next <= 30 else 30;
+        if next == None:
+            return None
+        if next < 0:
+            return 0
+        return next
     def call_timers(self):
         for timer in self.timers[:]:
             if timer.due():
                 timer.call()
                 if timer.done():
                     self.timer_setting_remove(timer)
+    def next_write(self):
+        next = None
+        for server in self.servers.values():
+            timeout = server.send_timeout()
+            if not next or timeout < next:
+                next = timeout
+        if next == None:
+            return None
+        if next < 0:
+            return 0
+        return next
+
+    def get_poll_timeout(self):
+        next_timer = self.next_timer() or 30
+        next_write = self.next_write() or 30
+        return min(next_timer, next_write)
 
     def register_read(self, server):
         self.poll.modify(server.fileno(), select.EPOLLIN)
@@ -82,7 +102,7 @@ class Bot(object):
             select.EPOLLIN|select.EPOLLOUT)
 
     def since_last_read(self, server):
-        return None if not server.last_read else time.time(
+        return None if not server.last_read else time.monotonic(
             )-server.last_read
 
     def disconnect(self, server):
@@ -115,7 +135,7 @@ class Bot(object):
     def run(self):
         while self.running:
             self.lock.acquire()
-            events = self.poll.poll(self.next_timer())
+            events = self.poll.poll(self.get_poll_timeout())
             self.call_timers()
             for fd, event in events:
                 if fd in self.servers:
diff --git a/IRCLineHandler.py b/IRCLineHandler.py
index 38bf49a0..f67beb58 100644
--- a/IRCLineHandler.py
+++ b/IRCLineHandler.py
@@ -141,6 +141,9 @@ def handle_353(data):
             channel.add_user(user)
             for mode in modes:
                 channel.add_mode(mode, nickname)
+@handler(description="on-join user list has finished", default_event=True)
+def handle_366(data):
+    data.server.send_who(data.args[2])
 
 @handler(description="on user joining channel")
 def handle_JOIN(data):
@@ -161,7 +164,6 @@ def handle_JOIN(data):
             del server.attempted_join[channel.name]
         bot.events.on("self").on("join").call(channel=channel,
             server=data.server)
-        server.send_who(channel.name)
         channel.send_mode()
 
 @handler(description="on user parting channel")
diff --git a/IRCServer.py b/IRCServer.py
index ee280010..5575e680 100644
--- a/IRCServer.py
+++ b/IRCServer.py
@@ -30,6 +30,7 @@ class Server(object):
         self.channel_modes = []
         self.channel_types = []
         self.last_read = None
+        self.last_send = None
         self.attempted_join = {}
         self.ping_sent = False
         self.name = None
@@ -205,7 +206,7 @@ class Server(object):
             decoded_lines.append(line)
         if not decoded_lines:
             self.disconnect()
-        self.last_read = time.time()
+        self.last_read = time.monotonic()
         self.ping_sent = False
         return decoded_lines
     def send(self, data):
@@ -217,9 +218,16 @@ class Server(object):
             print(encoded.decode("utf8"))
     def _send(self):
         self.write_buffer = self.write_buffer[self.socket.send(
-            self.write_buffer):]
+            self.write_buffer[:512]):]
+        self.last_send = time.monotonic()
     def waiting_send(self):
-        return bool(len(self.write_buffer))
+        return bool(len(self.write_buffer)) and self.send_timeout() == 0
+    def send_timeout(self):
+        if self.last_send == None:
+            return 0
+        timeout = (self.last_send)+0.5
+        timeout = timeout-time.monotonic()
+        return max(timeout, 0)
 
     def send_user(self, username, realname):
         self.send("USER %s - - :%s" % (username, realname))