{"action":"created","comment":{"url":"https://api.github.com/repos/pandas-dev/pandas/pulls/comments/224562824","pull_request_review_id":163962164,"id":224562824,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDIyNDU2MjgyNA==","diff_hunk":"@@ -2158,7 +2169,7 @@ def take(self, indices, axis=0, allow_fill=True,\n             if allow_fill and fill_value is not None:\n                 msg = 'Unable to fill values because {0} cannot contain NA'\n                 raise ValueError(msg.format(self.__class__.__name__))\n-            taken = self.values.take(indices)\n+            taken = self._take_values.take(indices)","path":"pandas/core/indexes/base.py","position":32,"original_position":32,"commit_id":"62f0f1f63d64c92e6ce0fb5dbd778986fb0a5f08","original_commit_id":"62f0f1f63d64c92e6ce0fb5dbd778986fb0a5f08","user":{"login":"jbrockmendel","id":8078968,"node_id":"MDQ6VXNlcjgwNzg5Njg=","avatar_url":"https://avatars1.githubusercontent.com/u/8078968?v=4","gravatar_id":"","url":"https://api.github.com/users/jbrockmendel","html_url":"https://github.com/jbrockmendel","followers_url":"https://api.github.com/users/jbrockmendel/followers","following_url":"https://api.github.com/users/jbrockmendel/following{/other_user}","gists_url":"https://api.github.com/users/jbrockmendel/gists{/gist_id}","starred_url":"https://api.github.com/users/jbrockmendel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jbrockmendel/subscriptions","organizations_url":"https://api.github.com/users/jbrockmendel/orgs","repos_url":"https://api.github.com/users/jbrockmendel/repos","events_url":"https://api.github.com/users/jbrockmendel/events{/privacy}","received_events_url":"https://api.github.com/users/jbrockmendel/received_events","type":"User","site_admin":false},"body":"_take_values will be iNaT in locations where values are NaT, after passing to shallow_copy/simple_new, we get NaT back","created_at":"2018-10-11T18:48:11Z","updated_at":"2018-10-11T18:48:11Z","html_url":"https://github.com/pandas-dev/pandas/pull/23095#discussion_r224562824","pull_request_url":"https://api.github.com/repos/pandas-dev/pandas/pulls/23095","author_association":"MEMBER","_links":{"self":{"href":"https://api.github.com/repos/pandas-dev/pandas/pulls/comments/224562824"},"html":{"href":"https://github.com/pandas-dev/pandas/pull/23095#discussion_r224562824"},"pull_request":{"href":"https://api.github.com/repos/pandas-dev/pandas/pulls/23095"}},"in_reply_to_id":224546385},"pull_request":{"url":"https://api.github.com/repos/pandas-dev/pandas/pulls/23095","id":222221727,"node_id":"MDExOlB1bGxSZXF1ZXN0MjIyMjIxNzI3","html_url":"https://github.com/pandas-dev/pandas/pull/23095","diff_url":"https://github.com/pandas-dev/pandas/pull/23095.diff","patch_url":"https://github.com/pandas-dev/pandas/pull/23095.patch","issue_url":"https://api.github.com/repos/pandas-dev/pandas/issues/23095","number":23095,"state":"open","locked":false,"title":"PERF: PeriodIndex.dropna, difference, take","user":{"login":"jbrockmendel","id":8078968,"node_id":"MDQ6VXNlcjgwNzg5Njg=","avatar_url":"https://avatars1.githubusercontent.com/u/8078968?v=4","gravatar_id":"","url":"https://api.github.com/users/jbrockmendel","html_url":"https://github.com/jbrockmendel","followers_url":"https://api.github.com/users/jbrockmendel/followers","following_url":"https://api.github.com/users/jbrockmendel/following{/other_user}","gists_url":"https://api.github.com/users/jbrockmendel/gists{/gist_id}","starred_url":"https://api.github.com/users/jbrockmendel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jbrockmendel/subscriptions","organizations_url":"https://api.github.com/users/jbrockmendel/orgs","repos_url":"https://api.github.com/users/jbrockmendel/repos","events_url":"https://api.github.com/users/jbrockmendel/events{/privacy}","received_events_url":"https://api.github.com/users/jbrockmendel/received_events","type":"User","site_admin":false},"body":"Related #23083 \r\n\r\nBesides the performance boost, this goes a long way towards making `PeriodIndex._simple_new` actually simple; avoids passing object-dtype to `_simple_new`\r\n\r\n```\r\nIn [2]: pi_with_nas = pd.PeriodIndex(['1985Q1', 'NaT', '1985Q2'] * 1000, freq='Q')\r\nIn [3]: %timeit pi_with_nas.dropna()\r\nThe slowest run took 13.93 times longer than the fastest. 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