Created by: kebinC

version1:

node_list.append(w * nodes[i])

version2:

var_w = fluid.layers.create_global_var(
    shape=[scale, scale],
    value=w,
    dtype='float32',
    persistable=True)
node_list.append(
    fluid.layers.elementwise_mul(x=nodes[i], y=var_w))

version1速度要比version2 慢很多