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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"When %matplotlib inline is ON gc.collect() runs on every cell execution","articleBody":"Hi,\n\nI'm not sure if it is the best place to put this issue. I'm working on an IPython notebook with a lot of objects loaded: `len(gc.get_objects())` is about 5M. Everything works fine until an inline plot is drawn. Drawing itself is fast, but then there is a delay (5-10s). The delay is caused by `gc.collect()` executed by matplotlib: https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/_pylab_helpers.py#L93. After the first plot the notebook becomes slow for all cells (even without inline plots). When interrupting the kernel (for cells without plots) I can see the same `gc.collect()` happening inside matplotlib.\n\nAs a workaround I'm monkey-patching `gc.collect` to be no-op, but this is clearly a hack.\n\nIt is `gc.collect()` call in matplotlib code that makes things slow, but why does IPython notebook need to call matplotlib code for cells without charts?\n","author":{"url":"https://github.com/kmike","@type":"Person","name":"kmike"},"datePublished":"2014-05-06T22:08:30.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/5795/ipython/issues/5795"}