XLAなし: 1.043673
XLAあり: 2.730577 (2.6倍速い)
def gen_graph(): i = tf.Variable(tf.random_normal([500, 1024]), name='i') j = tf.Variable(tf.random_normal([500, 1024]), name='j') f = tf.Variable(tf.random_normal([500, 1024]), name='f') o = tf.Variable(tf.random_normal([500, 1024]), name='o') c = tf.Variable(tf.random_normal([500, 1024]), name='c') i = tf.sigmoid(i) j = tf.tanh(j) f = tf.sigmoid(f) o = tf.sigmoid(o) nc = c * f + j * i nh = tf.multiply(nc, o, name='result') return nh