{"action":"created","issue":{"url":"https://api.github.com/repos/apache/spark/issues/14869","repository_url":"https://api.github.com/repos/apache/spark","labels_url":"https://api.github.com/repos/apache/spark/issues/14869/labels{/name}","comments_url":"https://api.github.com/repos/apache/spark/issues/14869/comments","events_url":"https://api.github.com/repos/apache/spark/issues/14869/events","html_url":"https://github.com/apache/spark/pull/14869","id":173883777,"number":14869,"title":"[SPARK-17301][SQL] Remove unused classTag field from AtomicType base class","user":{"login":"JoshRosen","id":50748,"avatar_url":"https://avatars.githubusercontent.com/u/50748?v=3","gravatar_id":"","url":"https://api.github.com/users/JoshRosen","html_url":"https://github.com/JoshRosen","followers_url":"https://api.github.com/users/JoshRosen/followers","following_url":"https://api.github.com/users/JoshRosen/following{/other_user}","gists_url":"https://api.github.com/users/JoshRosen/gists{/gist_id}","starred_url":"https://api.github.com/users/JoshRosen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JoshRosen/subscriptions","organizations_url":"https://api.github.com/users/JoshRosen/orgs","repos_url":"https://api.github.com/users/JoshRosen/repos","events_url":"https://api.github.com/users/JoshRosen/events{/privacy}","received_events_url":"https://api.github.com/users/JoshRosen/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2016-08-29T22:02:23Z","updated_at":"2016-08-29T22:07:49Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/14869","html_url":"https://github.com/apache/spark/pull/14869","diff_url":"https://github.com/apache/spark/pull/14869.diff","patch_url":"https://github.com/apache/spark/pull/14869.patch"},"body":"There's an unused `classTag` val in the AtomicType base class which is causing unnecessary slowness in deserialization because it needs to grab ScalaReflectionLock and create a new runtime reflection mirror. Removing this unused code gives a small but measurable performance boost in SQL task deserialization."},"comment":{"url":"https://api.github.com/repos/apache/spark/issues/comments/243272826","html_url":"https://github.com/apache/spark/pull/14869#issuecomment-243272826","issue_url":"https://api.github.com/repos/apache/spark/issues/14869","id":243272826,"user":{"login":"SparkQA","id":8108735,"avatar_url":"https://avatars.githubusercontent.com/u/8108735?v=3","gravatar_id":"","url":"https://api.github.com/users/SparkQA","html_url":"https://github.com/SparkQA","followers_url":"https://api.github.com/users/SparkQA/followers","following_url":"https://api.github.com/users/SparkQA/following{/other_user}","gists_url":"https://api.github.com/users/SparkQA/gists{/gist_id}","starred_url":"https://api.github.com/users/SparkQA/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SparkQA/subscriptions","organizations_url":"https://api.github.com/users/SparkQA/orgs","repos_url":"https://api.github.com/users/SparkQA/repos","events_url":"https://api.github.com/users/SparkQA/events{/privacy}","received_events_url":"https://api.github.com/users/SparkQA/received_events","type":"User","site_admin":false},"created_at":"2016-08-29T22:07:49Z","updated_at":"2016-08-29T22:07:49Z","body":"**[Test build #64605 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/64605/consoleFull)** for PR 14869 at commit [`da28f08`](https://github.com/apache/spark/commit/da28f089ecba338c8ae9ad53d3491007509fc72a)."}}
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