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   -------------------------------------------------------------------------------\r\n    Test name                                    | head[ms] | base[ms] |  ratio   |\r\n    -------------------------------------------------------------------------------\r\n    groupby_ngroups_10000_cumcount               |   3.9790 |  74.9559 |   0.0531 |\r\n    groupby_ngroups_100_cumcount                 |   0.6043 |   0.9940 |   0.6079 |\r\n    -------------------------------------------------------------------------------\r\n    Test name                                    | head[ms] | base[ms] |  ratio   |\r\n    -------------------------------------------------------------------------------\r\n\r\n    Ratio < 1.0 means the target commit is faster then the baseline.\r\n    Seed used: 1234\r\n\r\n    Target [2a1c935] : PERF: improves performance in GroupBy.cumcount\r\n    Base   [5b1f3b6] : reverts 'from .pandas_vb_common import *'\r\n"},"comment":{"url":"https://api.github.com/repos/pydata/pandas/issues/comments/139909469","html_url":"https://github.com/pydata/pandas/pull/11039#issuecomment-139909469","issue_url":"https://api.github.com/repos/pydata/pandas/issues/11039","id":139909469,"user":{"login":"jorisvandenbossche","id":1020496,"avatar_url":"https://avatars.githubusercontent.com/u/1020496?v=3","gravatar_id":"","url":"https://api.github.com/users/jorisvandenbossche","html_url":"https://github.com/jorisvandenbossche","followers_url":"https://api.github.com/users/jorisvandenbossche/followers","following_url":"https://api.github.com/users/jorisvandenbossche/following{/other_user}","gists_url":"https://api.github.com/users/jorisvandenbossche/gists{/gist_id}","starred_url":"https://api.github.com/users/jorisvandenbossche/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jorisvandenbossche/subscriptions","organizations_url":"https://api.github.com/users/jorisvandenbossche/orgs","repos_url":"https://api.github.com/users/jorisvandenbossche/repos","events_url":"https://api.github.com/users/jorisvandenbossche/events{/privacy}","received_events_url":"https://api.github.com/users/jorisvandenbossche/received_events","type":"User","site_admin":false},"created_at":"2015-09-13T19:18:07Z","updated_at":"2015-09-13T19:18:07Z","body":"@jreback and that is true for a DataFrame, but not Series (so this PR makes that analogy more consistent)"}}