Fixed #754 -- improved, dramatically, the performance of method_missing

tests/jit/test_basic.py

@@ -105,3 +105,62 @@ def test_constant_string(self, topaz, tmpdir):
         setfield_gc(p21, 41, descr=<FieldS topaz.executioncontext.ExecutionContext.inst_last_instr 24>)
         jump(p0, p1, p3, p4, p5, p6, p9, i41, p19, p21, p27, descr=TargetToken(4310789600))
         """)
+
+    def test_method_missing(self, topaz, tmpdir):
+        traces = self.run(topaz, tmpdir, """
+        i = 0
+        while i < 10000
+            Array.try_convert(1)
+            i += 1
+        end
+        """)
+        self.assert_matches(traces[0].loop, """
+        label(p0, p1, p3, p4, p6, p9, i55, p18, p21, p23, p29, descr=TargetToken(4323643288))
+        debug_merge_point(0, 0, '<main> at LOAD_DEREF')
+        debug_merge_point(0, 0, '<main> at LOAD_CONST')
+        debug_merge_point(0, 0, '<main> at SEND')
+        setfield_gc(p23, 21, descr=<FieldS topaz.executioncontext.ExecutionContext.inst_last_instr 24>)
+        guard_not_invalidated(descr=<Guard0x101c26c50>)
+        p58 = force_token()
+        i59 = int_lt(i55, 10000)
+        guard_true(i59, descr=<Guard0x101c26bd8>)
+        debug_merge_point(0, 0, '<main> at JUMP_IF_FALSE')
+        debug_merge_point(0, 0, '<main> at LOAD_SCOPE')
+        debug_merge_point(0, 0, '<main> at LOAD_LOCAL_CONSTANT')
+        debug_merge_point(0, 0, '<main> at LOAD_CONST')
+        debug_merge_point(0, 0, '<main> at SEND')
+        p60 = force_token()
+        debug_merge_point(1, 1, 'try_convert at LOAD_SCOPE')
+        debug_merge_point(1, 1, 'try_convert at LOAD_LOCAL_CONSTANT')
+        debug_merge_point(1, 1, 'try_convert at LOAD_DEREF')
+        debug_merge_point(1, 1, 'try_convert at LOAD_SCOPE')
+        debug_merge_point(1, 1, 'try_convert at LOAD_LOCAL_CONSTANT')
+        debug_merge_point(1, 1, 'try_convert at LOAD_CONST')
+        debug_merge_point(1, 1, 'try_convert at SEND')
+        p61 = force_token()
+        p62 = force_token()
+        p63 = force_token()
+        p64 = force_token()
+        p65 = force_token()
+        p66 = force_token()
+        p67 = force_token()
+        p68 = force_token()
+        p69 = force_token()
+        p70 = force_token()
+        p71 = force_token()
+        debug_merge_point(1, 1, 'try_convert at RETURN')
+        p72 = force_token()
+        debug_merge_point(0, 0, '<main> at DISCARD_TOP')
+        debug_merge_point(0, 0, '<main> at LOAD_DEREF')
+        debug_merge_point(0, 0, '<main> at LOAD_CONST')
+        debug_merge_point(0, 0, '<main> at SEND')
+        p73 = force_token()
+        i74 = int_add(i55, 1)
+        debug_merge_point(0, 0, '<main> at STORE_DEREF')
+        debug_merge_point(0, 0, '<main> at DISCARD_TOP')
+        debug_merge_point(0, 0, '<main> at JUMP')
+        debug_merge_point(0, 0, '<main> at LOAD_DEREF')
+        setfield_gc(p23, 48, descr=<FieldS topaz.executioncontext.ExecutionContext.inst_last_instr 24>)
+        setfield_gc(p1, p72, descr=<FieldP topaz.frame.Frame.vable_token 32>)
+        jump(p0, p1, p3, p4, p6, p9, i74, p18, p21, p23, p29, descr=TargetToken(4323643288))
+        """)

topaz/objspace.py

@@ -622,7 +622,7 @@ def _send_raw(self, name, raw_method, w_receiver, w_cls, args_w, block):
                     "undefined method `%s' for %s" % (name, class_name)
                 )
             else:
-                args_w.insert(0, self.newsymbol(name))
+                args_w = [self.newsymbol(name)] + args_w
                 return method_missing.call(self, w_receiver, args_w, block)
         return raw_method.call(self, w_receiver, args_w, block)