René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Default legend location 'best' is extremely slow","articleBody":"Matplotlib 2.0.0 seems to have changed the default legend location from \"upper right\" to \"best\" (although the documentation doesn't say this). I have noticed that this results in a severe performance penalty: several plots which would normally render in a fraction of a second now need 5-10 seconds. To make things worse, the legend location is recalculated whenever the plot is moved or zoomed. The sharex/sharey functionality which I use quite a lot makes this even slower, since all subplots are moved or zoomed simultaneously.\r\n\r\n**Code for reproduction**\r\n\r\n```python\r\nfrom pylab import *\r\n\r\nx = linspace(0, 100, 100000)\r\n\r\nclose(\"all\")\r\nfigure(\"Test\", figsize=(12, 8))\r\nfor j in range(9):\r\n\tif j == 0:\r\n\t\tax = subplot(3, 3, 1)\r\n\telse:\r\n\t\tsubplot(3, 3, j + 1, sharex=ax, sharey=ax)\r\n\tfor i in range(8):\r\n\t\tplot(x, sin(x + i * 0.5), color=cm.magma(i/8), label=\"test\")\r\n\tlegend(fontsize=\"small\")\r\n\r\ntight_layout()\r\nshow()\r\n```\r\n\r\n**Matplotlib version**\r\n\r\n- Matplotlib 2.0.0 (installed with pip)\r\n- Python 3.6.0 (compiled from source)\r\n- Platform: Linux (CentOS 6)","author":{"url":"https://github.com/MaartenBaert","@type":"Person","name":"MaartenBaert"},"datePublished":"2017-02-20T18:12:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":18},"url":"https://github.com/8108/matplotlib/issues/8108"}