[jira] [Updated] (KYLIN-3656) Improve HLLCounter performance
[ https://issues.apache.org/jira/browse/KYLIN-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Chang chen updated KYLIN-3656: -- Attachment: image-2018-11-05-18-15-36-463.png > Improve HLLCounter performance > -- > > Key: KYLIN-3656 > URL: https://issues.apache.org/jira/browse/KYLIN-3656 > Project: Kylin > Issue Type: Improvement >Affects Versions: all >Reporter: Chang chen >Assignee: Chang chen >Priority: Major > Fix For: v2.6.0 > > Attachments: 0001-KYLIN-3656-Improve-HLLCounter-performance.patch, > image-2018-11-05-18-15-36-463.png > > > The current HLLCounter implementation has some room to improve performance, > as we find in our product environment. > # Create HLLCounter from another HLLCounter, we can copy register instead > of merge > # To compute harmonic mean in the HLLCSnapshot, we could > ## using table to cache all 1/2^r without computing on the fly > ## remove floating addition by using integer addition in the bigger loop > ## remove branch, e.g. needn't checking whether registers[i] is zero or not, > although this is minor improvement. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Updated] (KYLIN-3656) Improve HLLCounter performance
[ https://issues.apache.org/jira/browse/KYLIN-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Shaofeng SHI updated KYLIN-3656: Fix Version/s: v2.6.0 > Improve HLLCounter performance > -- > > Key: KYLIN-3656 > URL: https://issues.apache.org/jira/browse/KYLIN-3656 > Project: Kylin > Issue Type: Improvement >Affects Versions: all >Reporter: Chang chen >Priority: Major > Fix For: v2.6.0 > > Attachments: 0001-KYLIN-3656-Improve-HLLCounter-performance.patch > > > The current HLLCounter implementation has some room to improve performance, > as we find in our product environment. > # Create HLLCounter from another HLLCounter, we can copy register instead > of merge > # To compute harmonic mean in the HLLCSnapshot, we could > ## using table to cache all 1/2^r without computing on the fly > ## remove floating addition by using integer addition in the bigger loop > ## remove branch, e.g. needn't checking whether registers[i] is zero or not, > although this is minor improvement. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
[jira] [Updated] (KYLIN-3656) Improve HLLCounter performance
[ https://issues.apache.org/jira/browse/KYLIN-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Chang chen updated KYLIN-3656: -- Attachment: 0001-KYLIN-3656-Improve-HLLCounter-performance.patch > Improve HLLCounter performance > -- > > Key: KYLIN-3656 > URL: https://issues.apache.org/jira/browse/KYLIN-3656 > Project: Kylin > Issue Type: Improvement >Affects Versions: all >Reporter: Chang chen >Priority: Major > Attachments: 0001-KYLIN-3656-Improve-HLLCounter-performance.patch > > > The current HLLCounter implementation has some room to improve performance, > as we find in our product environment. > # Create HLLCounter from another HLLCounter, we can copy register instead > of merge > # To compute harmonic mean in the HLLCSnapshot, we could > ## using table to cache all 1/2^r without computing on the fly > ## remove floating addition by using integer addition in the bigger loop > ## remove branch, e.g. needn't checking whether registers[i] is zero or not, > although this is minor improvement. -- This message was sent by Atlassian JIRA (v7.6.3#76005)
