René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"font_manager.py takes multiple seconds to import","articleBody":"This is brutal amount of latency when trying to provide a smooth user experience from an application that uses matplotlib internally.\n\n```\nIn [1]: %prun -r -s cumtime -l 20 import matplotlib.pyplot\n\nncalls  tottime  percall  cumtime  percall filename:lineno(function)\n        1    0.002    0.002    2.461    2.461 \u003cstring\u003e:1(\u003cmodule\u003e)\n        1    0.001    0.001    2.413    2.413 pyplot.py:17(\u003cmodule\u003e)\n        1    0.001    0.001    2.392    2.392 colorbar.py:20(\u003cmodule\u003e)\n        1    0.001    0.001    2.380    2.380 collections.py:10(\u003cmodule\u003e)\n        1    0.002    0.002    2.374    2.374 backend_bases.py:28(\u003cmodule\u003e)\n        1    0.001    0.001    2.365    2.365 textpath.py:3(\u003cmodule\u003e)\n        1    0.001    0.001    2.362    2.362 font_manager.py:21(\u003cmodule\u003e)\n        1    0.000    0.000    2.361    2.361 font_manager.py:952(pickle_load)\n        1    0.003    0.003    2.361    2.361 {cPickle.load}\n        1    0.001    0.001    2.358    2.358 font_manager.py:1013(__init__)\n        2    0.098    0.049    2.275    1.137 font_manager.py:544(createFontList)\n      215    0.000    0.000    2.149    0.010 afm.py:341(__init__)\n      215    0.001    0.000    2.148    0.010 afm.py:323(parse_afm)\n      215    0.001    0.000    1.443    0.007 afm.py:292(_parse_optional)\n      182    0.979    0.005    1.434    0.008 afm.py:220(_parse_kern_pairs)\n      215    0.374    0.002    0.690    0.003 afm.py:180(_parse_char_metrics)\n  1298020    0.229    0.000    0.229    0.000 {method 'split' of 'str' objects}\n   839978    0.157    0.000    0.157    0.000 {method 'readline' of 'file' objects}\n   114276    0.087    0.000    0.107    0.000 afm.py:72(_to_list_of_floats)\n   843180    0.092    0.000    0.092    0.000 {method 'startswith' of 'str' objects}\n        4    0.000    0.000    0.082    0.021 font_manager.py:294(findSystemFonts)q\n```\n","author":{"url":"https://github.com/ssanderson","@type":"Person","name":"ssanderson"},"datePublished":"2015-07-22T14:46:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":11},"url":"https://github.com/4756/matplotlib/issues/4756"}