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Pathologically slow example

See original GitHub issue

The following takes 25 seconds to reformat on my machine. In comparison, many significantly larger files run in under a second:

specialElements = frozenset((
    (namespaces['html'], 'address'),
    (namespaces['html'], 'applet'),
    (namespaces['html'], 'area'),
    (namespaces['html'], 'article'),
    (namespaces['html'], 'aside'),
    (namespaces['html'], 'base'),
    (namespaces['html'], 'basefont'),
    (namespaces['html'], 'bgsound'),
    (namespaces['html'], 'blockquote'),
    (namespaces['html'], 'body'),
    (namespaces['html'], 'br'),
    (namespaces['html'], 'button'),
    (namespaces['html'], 'caption'),
    (namespaces['html'], 'center'),
    (namespaces['html'], 'col'),
    (namespaces['html'], 'colgroup'),
    (namespaces['html'], 'command'),
    (namespaces['html'], 'dd'),
    (namespaces['html'], 'details'),
    (namespaces['html'], 'dir'),
    (namespaces['html'], 'div'),
    (namespaces['html'], 'dl'),
    (namespaces['html'], 'dt'),
    (namespaces['html'], 'embed'),
    (namespaces['html'], 'fieldset'),
    (namespaces['html'], 'figure'),
    (namespaces['html'], 'footer'),
    (namespaces['html'], 'form'),
    (namespaces['html'], 'frame'),
    (namespaces['html'], 'frameset'),
    (namespaces['html'], 'h1'),
    (namespaces['html'], 'h2'),
    (namespaces['html'], 'h3'),
    (namespaces['html'], 'h4'),
    (namespaces['html'], 'h5'),
    (namespaces['html'], 'h6'),
    (namespaces['html'], 'head'),
    (namespaces['html'], 'header'),
    (namespaces['html'], 'hr'),
    (namespaces['html'], 'html'),
    (namespaces['html'], 'iframe'),
    # Note that image is commented out in the spec as "this isn't an
    # element that can end up on the stack, so it doesn't matter,"
    (namespaces['html'], 'image'),
    (namespaces['html'], 'img'),
    (namespaces['html'], 'input'),
    (namespaces['html'], 'isindex'),
    (namespaces['html'], 'li'),
    (namespaces['html'], 'link'),
    (namespaces['html'], 'listing'),
    (namespaces['html'], 'marquee'),
    (namespaces['html'], 'menu'),
    (namespaces['html'], 'meta'),
    (namespaces['html'], 'nav'),
    (namespaces['html'], 'noembed'),
    (namespaces['html'], 'noframes'),
    (namespaces['html'], 'noscript'),
    (namespaces['html'], 'object'),
    (namespaces['html'], 'ol'),
    (namespaces['html'], 'p'),
    (namespaces['html'], 'param'),
    (namespaces['html'], 'plaintext'),
    (namespaces['html'], 'pre'),
    (namespaces['html'], 'script'),
    (namespaces['html'], 'section'),
    (namespaces['html'], 'select'),
    (namespaces['html'], 'style'),
    (namespaces['html'], 'table'),
    (namespaces['html'], 'tbody'),
    (namespaces['html'], 'td'),
    (namespaces['html'], 'textarea'),
    (namespaces['html'], 'tfoot'),
    (namespaces['html'], 'th'),
    (namespaces['html'], 'thead'),
    (namespaces['html'], 'title'),
    (namespaces['html'], 'tr'),
    (namespaces['html'], 'ul'),
    (namespaces['html'], 'wbr'),
    (namespaces['html'], 'xmp'),
    (namespaces['svg'], 'foreignObject')
))

Issue Analytics

State:
Created 8 years ago
Reactions:3
Comments:16 (10 by maintainers)

Top GitHub Comments

8reactions

chknocommented, May 27, 2016

User (CPU) time running over first example above, measured at every yapf commit: yapf-speed

2reactions

haydcommented, May 26, 2016

Perhaps this/these should be added as a (timed) test?

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