Speed up Signals when there are no receivers. (#2229)

* Speed up Signals when there are no receivers. Reduce the footprint of the `send()` method by a 10% when there are no receivers connected. * Added change file * Removed invalid attributes * Make the _fast_len inline
aio-libs · Aug 28, 2017 · d2236cf · d2236cf
1 parent d7658d4
commit d2236cf
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/aiohttp/_frozenlist.pyx b/aiohttp/_frozenlist.pyx
@@ -18,6 +18,9 @@ cdef class FrozenList:
         if self.frozen:
             raise RuntimeError("Cannot modify frozen list.")
 
+    cdef inline object _fast_len(self):
+        return len(self._items)
+
     def freeze(self):
         self.frozen = True
 
@@ -33,7 +36,7 @@ cdef class FrozenList:
         del self._items[index]
 
     def __len__(self):
-        return self._items.__len__()
+        return self._fast_len()
 
     def __iter__(self):
         return self._items.__iter__()

diff --git a/changes/2229.feature b/changes/2229.feature
@@ -0,0 +1 @@
+Speed up Signals when there are no receivers