Revert "Speedup EMA"

This reverts commit 35fc732dadac4761852b18512b5c5df8785e36df.

ppcls/utils/ema.py

@@ -32,14 +32,11 @@ class ExponentialMovingAverage():
 
     @paddle.no_grad()
     def _update(self, model, update_fn):
-        for ema_v, model_v in zip(self.module.state_dict().values(),
-                                  model.state_dict().values()):
-            ema_v.set_value(update_fn(ema_v.numpy(), model_v.numpy()))
+        for ema_v, model_v in zip(self.module.state_dict().values(), model.state_dict().values()):
+            ema_v.set_value(update_fn(ema_v, model_v))
 
     def update(self, model):
-        self._update(
-            model,
-            update_fn=lambda e, m: self.decay * e + (1. - self.decay) * m)
+        self._update(model, update_fn=lambda e, m: self.decay * e + (1. - self.decay) * m)
 
     def set(self, model):
         self._update(model, update_fn=lambda e, m: m)
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