Even turning off font-lock-mode and set (setq python-shell-font-lock-enable nil), the output of an ipython shell

(setq python-shell-interpreter "ipython")

seems much slow than the python shell

(setq python-shell-interpreter "python").

A test snippet would be

import numpy as np
np.set_printoptions(precision=8, threshold=10000, linewidth=120)
np.random.randn(99, 99)

My emacs version is GNU Emacs 25.1.1 (x86_64-apple-darwin16.3.0, Carbon Version 157 AppKit 1504.76) of 2017-01-14 and ipython version is 5.1.0.

Is it possible to speed up the output of ipython shell ? Any help will be appreciated.

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