{"action":"created","issue":{"url":"https://api.github.com/repos/apache/spark/issues/22338","repository_url":"https://api.github.com/repos/apache/spark","labels_url":"https://api.github.com/repos/apache/spark/issues/22338/labels{/name}","comments_url":"https://api.github.com/repos/apache/spark/issues/22338/comments","events_url":"https://api.github.com/repos/apache/spark/issues/22338/events","html_url":"https://github.com/apache/spark/pull/22338","id":357129380,"node_id":"MDExOlB1bGxSZXF1ZXN0MjEzMjE2NDc2","number":22338,"title":"[SPARK-25317][CORE] Avoid perf regression in Murmur3 Hash on UTF8String","user":{"login":"mgaido91","id":8821783,"node_id":"MDQ6VXNlcjg4MjE3ODM=","avatar_url":"https://avatars1.githubusercontent.com/u/8821783?v=4","gravatar_id":"","url":"https://api.github.com/users/mgaido91","html_url":"https://github.com/mgaido91","followers_url":"https://api.github.com/users/mgaido91/followers","following_url":"https://api.github.com/users/mgaido91/following{/other_user}","gists_url":"https://api.github.com/users/mgaido91/gists{/gist_id}","starred_url":"https://api.github.com/users/mgaido91/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mgaido91/subscriptions","organizations_url":"https://api.github.com/users/mgaido91/orgs","repos_url":"https://api.github.com/users/mgaido91/repos","events_url":"https://api.github.com/users/mgaido91/events{/privacy}","received_events_url":"https://api.github.com/users/mgaido91/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":12,"created_at":"2018-09-05T08:54:54Z","updated_at":"2018-09-05T13:57:39Z","closed_at":null,"author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/22338","html_url":"https://github.com/apache/spark/pull/22338","diff_url":"https://github.com/apache/spark/pull/22338.diff","patch_url":"https://github.com/apache/spark/pull/22338.patch"},"body":"## What changes were proposed in this pull request?\r\n\r\nSPARK-10399 introduced a performance regression on the hash computation for UTF8String.\r\n\r\nThe regression can be evaluated with the code attached in the JIRA. That code runs in about 120 us per method on my laptop (MacBook Pro 2.5 GHz Intel Core i7, RAM 16 GB 1600 MHz DDR3) while the code from branch 2.3 takes on the same machine about 45 us for me. After the PR, the code takes about 45 us on the master branch too.\r\n\r\n## How was this patch tested?\r\n\r\nrunning the perf test from the JIRA"},"comment":{"url":"https://api.github.com/repos/apache/spark/issues/comments/418740656","html_url":"https://github.com/apache/spark/pull/22338#issuecomment-418740656","issue_url":"https://api.github.com/repos/apache/spark/issues/22338","id":418740656,"node_id":"MDEyOklzc3VlQ29tbWVudDQxODc0MDY1Ng==","user":{"login":"AmplabJenkins","id":4031291,"node_id":"MDQ6VXNlcjQwMzEyOTE=","avatar_url":"https://avatars3.githubusercontent.com/u/4031291?v=4","gravatar_id":"","url":"https://api.github.com/users/AmplabJenkins","html_url":"https://github.com/AmplabJenkins","followers_url":"https://api.github.com/users/AmplabJenkins/followers","following_url":"https://api.github.com/users/AmplabJenkins/following{/other_user}","gists_url":"https://api.github.com/users/AmplabJenkins/gists{/gist_id}","starred_url":"https://api.github.com/users/AmplabJenkins/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/AmplabJenkins/subscriptions","organizations_url":"https://api.github.com/users/AmplabJenkins/orgs","repos_url":"https://api.github.com/users/AmplabJenkins/repos","events_url":"https://api.github.com/users/AmplabJenkins/events{/privacy}","received_events_url":"https://api.github.com/users/AmplabJenkins/received_events","type":"User","site_admin":false},"created_at":"2018-09-05T13:57:39Z","updated_at":"2018-09-05T13:57:39Z","author_association":"NONE","body":"Test PASSed.\nRefer to this link for build results (access rights to CI server needed): \nhttps://amplab.cs.berkeley.edu/jenkins//job/testing-k8s-prb-make-spark-distribution-unified/2877/\nTest PASSed."}}
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