diff --git a/benchmarks/hub_timers.py b/benchmarks/hub_timers.py
new file mode 100644
index 0000000..1df7386
--- /dev/null
+++ b/benchmarks/hub_timers.py
@@ -0,0 +1,41 @@
+#! /usr/bin/env python
+
+# test timer adds & expires on hubs.hub.BaseHub
+
+import sys
+import eventlet
+import random
+import time
+from eventlet.hubs import timer, get_hub
+
+timer_count = 100000
+
+if len(sys.argv) >= 2:
+    timer_count = int(sys.argv[1])
+
+l = []
+
+def work(n):
+    l.append(n)
+
+timeouts = [random.uniform(0, 10) for x in xrange(timer_count)]
+
+hub = get_hub()
+
+start = time.time()
+
+scheduled = []
+
+for timeout in timeouts:
+    t = timer.Timer(timeout, work, timeout)
+    t.schedule()
+
+    scheduled.append(t)
+
+hub.prepare_timers()
+hub.fire_timers(time.time()+11)
+hub.prepare_timers()
+
+end = time.time()
+
+print "Duration: %f" % (end-start,)
diff --git a/eventlet/greenio.py b/eventlet/greenio.py
index 7214bc6..da26dc6 100644
--- a/eventlet/greenio.py
+++ b/eventlet/greenio.py
@@ -281,24 +281,31 @@ class GreenSocket(object):
         fd = self.fd
         if self.act_non_blocking:
             return fd.send(data, flags)
-        try:
+
+        # blocking socket behavior - sends all, blocks if the buffer is full
+        total_sent = 0
+        len_data = len(data)
+
+        while 1:
+            try:
+                total_sent += fd.send(data[total_sent:], flags)
+            except socket.error, e:
+                if e[0] not in SOCKET_BLOCKING:
+                    raise
+
+            if total_sent == len_data:
+                break
+
             trampoline(self.fd, write=True, timeout=self.gettimeout(),
                     timeout_exc=socket.timeout("timed out"))
-            return fd.send(data, flags)
-        except socket.error, e:
-            if e[0] in SOCKET_BLOCKING:
-                return 0
-            raise
+
+        return total_sent
 
     def sendall(self, data, flags=0):
         fd = self.fd
         tail = self.send(data, flags)
         len_data = len(data)
         while tail < len_data:
-            trampoline(fd, 
-                write=True, 
-                timeout=self.timeout, 
-                timeout_exc=socket.timeout("timed out"))
             tail += self.send(data[tail:], flags)
 
     def sendto(self, *args):
diff --git a/eventlet/hubs/hub.py b/eventlet/hubs/hub.py
index c5e885e..90a1ad7 100644
--- a/eventlet/hubs/hub.py
+++ b/eventlet/hubs/hub.py
@@ -1,4 +1,4 @@
-import bisect
+import heapq
 import sys
 import traceback
 
@@ -196,10 +196,10 @@ class BaseHub(object):
         self.timer_finished(timer)
 
     def prepare_timers(self):
-        ins = bisect.insort_right
+        heappush = heapq.heappush
         t = self.timers
         for item in self.next_timers:
-            ins(t, item)
+            heappush(t, item)
         del self.next_timers[:]
 
     def schedule_call_local(self, seconds, cb, *args, **kw):
@@ -229,10 +229,21 @@ class BaseHub(object):
 
     def fire_timers(self, when):
         t = self.timers
-        last = bisect.bisect_right(t, (when, 1))
+        heappop = heapq.heappop
+
         i = 0
-        for i in xrange(last):
-            timer = t[i][2]
+
+        while t:
+            next = t[0]
+
+            exp = next[0]
+            timer = next[2]
+
+            if when < exp:
+                break
+
+            heappop(t)
+
             try:
                 try:
                     timer()
@@ -242,7 +253,6 @@ class BaseHub(object):
                     self.squelch_timer_exception(timer, sys.exc_info())
             finally:
                 self.timer_finished(timer)
-        del t[:last]
 
     # for debugging:
 
diff --git a/tests/greenio_test.py b/tests/greenio_test.py
index 0aa8823..f71e40c 100644
--- a/tests/greenio_test.py
+++ b/tests/greenio_test.py
@@ -173,11 +173,12 @@ class TestGreenIo(LimitedTestCase):
         client.connect(addr)
 
         try:
-            msg = "A"*(8*1024*1024)
+            msg = "A"*8192*1024
 
+            total_sent = 0
             # want to exceed the size of the OS buffer so it'll block
             for x in range(10):
-                client.send(msg)
+                total_sent += client.send(msg)
             self.fail("socket.timeout not raised")
         except socket.timeout, e:
             self.assert_(hasattr(e, 'args'))