pull in additional changes from 2.0 branch.

[monitor.git] / monitor / Rpyc / Demo / demo-4.py

diff --git a/monitor/Rpyc/Demo/demo-4.py b/monitor/Rpyc/Demo/demo-4.py
new file mode 100644 (file)
index 0000000..1a651ae
--- /dev/null
+++ b/monitor/Rpyc/Demo/demo-4.py
@@ -0,0 +1,41 @@
+import time\r
+from Rpyc.Factories import SocketConnection, Async\r
+\r
+c = SocketConnection("localhost")\r
+c2 = SocketConnection("localhost")\r
+\r
+huge_xml = "<blah a='5' b='6'>   " * 50000 + "   </blah> " * 50000\r
+parseString = Async(c.modules.xml.dom.minidom.parseString)\r
+res = parseString(huge_xml)\r
+\r
+print "while we're waiting for the server to complete, we do other stuff"\r
+t = time.time()\r
+while not res.is_ready:\r
+    time.sleep(0.5)\r
+    # we dont want to use `c`, because it would block us (as the server is blocking)\r
+    # but `c2` runs on another thread/process, so it wouldn't block\r
+    print c2.modules.os.getpid()\r
+\r
+t = time.time() - t\r
+print "it took %d seconds" % (t,)\r
+\r
+print res.result\r
+\r
+\r
+#\r
+# note: to improve performance, delete the result when you no longer need it.\r
+# this should be done because the server might (as in this case) hold enormous \r
+# amounts of memory, which will slow it down\r
+#\r
+# if you do this:\r
+#   res = parseString(huge_xml)\r
+#   res = parseString(huge_xml)\r
+# res will be deleted only after the second operation finishes, because only when\r
+# the second result is assigned, the first is released -- server still holds \r
+# around 160MB of the old xml tree for nothing. so it's a good idea to `del res` \r
+# when you dont need it.\r
+#\r
+# also, there's a memory leak on the server, which i'm working on solving.\r
+#\r
+\r
+\r