Change Cython API to truncate data upon reception.

prrt/prrt.pyx

@@ -86,7 +86,7 @@ cdef class PrrtSocket:
         cdef int32_t len
         with nogil:
             len = cprrt.PrrtSocket_recv(self._c_socket, <void*> buffer)
-        return len, buffer
+        return buffer[:len]
 
     def connect(self, host, port):
         cdef bytes encodedHost = host.encode("utf-8")

tests/perf/__init__.py

@@ -22,8 +22,8 @@ class ReceiverThread(threading.Thread):
 
     def run(self):
         while(1):
-            len, data = self.sock.recv()
-            v = data[:len].decode('UTF-8')
+            data = self.sock.recv()
+            v = data.decode('UTF-8')
             seqno = v[:self.seqnoDigits]
             if seqno in self.received:
                 self.duplicates = self.duplicates + 1