Very slow line execution using IPython in macOS

[jeffak]

After running a few initial commands in a new IPython console (regardless of what they may be), line execution automatically defaults to multline mode and slows down considerably.
For example:

Opening new IPython console:
Python 3.5.1 (default, Dec 20 2015, 15:56:10) 
Type "copyright", "credits" or "license" for more information.

IPython 4.0.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.
%guiref   -> A brief reference about the graphical user interface.

In[1]: l1 = ['apple','orange','banana']
In[2]: l2 = ['carrot','onion','zucchini']
In[3]: l3 = ['yellow','green','red']
In[4]: l4 = ['Honda','Toyota','Ford']
  ...:

This last line will take several seconds to execute, and all subsequently entered statements will behave similarly, making the console virtually unusable.

OSX Yosemite (10.10.5)
Spyder: 2.3.8 (installed via pip)
Python: 3.5.1 (installed using homebrew)
Qt: 4.8.7_2 (installed using homebrew)

IPython >=1.0      :  4.0.1 (OK)
jedi >=0.8.1;<0.9.0:  0.8.1 (OK)
matplotlib >=1.0   :  1.5.0 (OK)
pandas >=0.13.1    :  0.17.1 (OK)
pep8 >=0.6         :  1.6.2 (OK)
psutil >=0.3       :  3.3.0 (OK)
pyflakes >=0.6.0   :  1.0.0 (OK)
pygments >=1.6     :  2.0.2 (OK)
pylint >=0.25      :  1.5.2 (OK)
qtconsole >=4.0    :  4.1.1 (OK)
rope >=0.9.2       :  0.10.3 (OK)
sphinx >=0.6.6     :  1.3.3 (OK)
sympy >=0.7.3      :  0.7.6.1 (OK)
zmq >=2.1.11       :  15.1.0 (OK)

This issue does not occur when opening a Qt console outside of the Spyder environment. Any help or suggestions would be much appreciated.

[ibackus]

This appears to affect me as well, although it's not exactly 100% reproducible. I'm not sure if the console is entering multiline mode, but sometimes, after some small number of commands, the console takes a second or so to finish any command. This makes the spyder console unusable.

Ubuntu 16.04 (Xenial)
python 2.7.11+
ipython 4.1.0rc1
Spyder 2.3.8
Qt 4.8.7

IPython >=1.0      :  4.1.0rc1 (OK)
jedi >=0.8.1;<0.9.0:  None (NOK)
matplotlib >=1.0   :  1.4.3 (OK)
pandas >=0.13.1    :  0.16.2 (OK)
pep8 >=0.6         :  1.6.2 (OK)
psutil >=0.3       :  3.2.2 (OK)
pyflakes >=0.5.0   :  0.9.2 (OK)
pygments >=1.6     :  2.0.2 (OK)
pylint >=0.25      :  1.4.4 (OK)
qtconsole >=4.0    :  4.1.1 (OK)
rope >=0.9.2       :  0.10.2 (OK)
sphinx >=0.6.6     :  1.3.1 (OK)
sympy >=0.7.3      :  0.7.6 (OK)
zmq >=2.1.11       :  14.7.0 (OK)

[jjruby09]

This just started happening for me as well after an update. Currently using:
Python 3.7.1
conda version 4.5.11
Spyder 3.3.1

same here, although I am afraid I can't point to exactly what changed on my system before/after the performance loss

Python 3.6.6
conda version 4.5.11
Spyder 3.3.1

Mac OS X 10.14

[jennifereldiaz]

Same. I'm new to anaconda/spyder and I've had this issue since I started.
Mac OSX 10.13.6
conda version : 4.5.11
conda-build version : 3.15.1
python version : 3.7.0.final.0
qt 5.9.6
spyder 3.3.1
ipython 7.1.1

[jjruby09]

A successful work around for me has been to downgrade to spyder 3.1.4, where the python console is still available for use. This issue does not occur with the python console but does occur with the Ipython console in this version as well. Additionally this has persisted through an update from OSX 10.13 to OSX 10.14.

Additionally see: https://stackoverflow.com/questions/53381373/ipython-console-in-spyder-extremely-slow-in-anaconda/53415444#53415444

Dependencies are:

jedi >=0.9.0     :  0.13.1 (OK)
matplotlib >=1.0 :  3.0.1 (OK)
nbconvert >=4.0  :  5.3.1 (OK)
numpy >=1.7      :  1.15.4 (OK)
pandas >=0.13.1  :  0.23.4 (OK)
pep8 >=0.6       :  1.7.1 (OK)
psutil >=0.3     :  5.4.8 (OK)
pyflakes >=0.6.0 :  2.0.0 (OK)
pygments >=2.0   :  2.2.0 (OK)
pylint >=0.25    :  2.1.1 (OK)
qtconsole >=4.2.0:  4.4.2 (OK)
rope >=0.9.4     :  0.11.0 (OK)
sphinx >=0.6.6   :  1.8.2 (OK)
sympy >=0.7.3    :  1.3 (OK)

thanks for this temporary solution @jjruby09 !

[jennifereldiaz]

Yep, python console in 3.1 works for me too. Also the issue is fully reproducible for me: the ipython console is painfully slow with any code in any anaconda environment

[ccordoba12]

Posting Me too is not helpful @andbeonetraveler. Are you also using macOS?

[jjruby09]

@ccordoba12 I think it was a follow up to the original post above stating the configuration.

Same. I'm new to anaconda/spyder and I've had this issue since I started.
Mac OSX 10.13.6
conda version : 4.5.11
conda-build version : 3.15.1
python version : 3.7.0.final.0
qt 5.9.6
spyder 3.3.1
ipython 7.1.1

[jennifereldiaz]

@jjruby09 yes. also I noticed a previous poster said it's not fully reproducible, but it is for me. Should have said that in my op.