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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/12/28 07:29:12 UTC

[GitHub] [hadoop] asdfgh19 opened a new pull request, #4714: HADOOP-18395. Performance improvement in hadoop-common Text#find

asdfgh19 opened a new pull request, #4714:
URL: https://github.com/apache/hadoop/pull/4714

   ### Description of PR
   JIRA: [HADOOP-18395](https://issues.apache.org/jira/browse/HADOOP-18395)
     The current implementation reset src and tgt to the mark and continues searching when tgt has remaining and src expired first. which is probably not necessary.
     In some cases, this commit can reduce the complexity from O(n²) to O(n), which can significantly improve performance, as in the following example.
   ```java
     public void testFindWithTimeout() throws Exception {
       byte[] bytes = new byte[1000000];
       Arrays.fill(bytes, (byte) 97);
       String what = new String(bytes);
       bytes[0] = (byte) 98;
       Text text = new Text(bytes);
   
       assertThat(text.find(what)).isEqualTo(-1);
     }
   ```
   
   ### How was this patch tested?
   unit test in org.apache.hadoop.io.TestText#testFind


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[GitHub] [hadoop] huxinqiu commented on pull request #4714: HADOOP-18395. Performance improvement in hadoop-common Text#find

Posted by GitBox <gi...@apache.org>.
huxinqiu commented on PR #4714:
URL: https://github.com/apache/hadoop/pull/4714#issuecomment-1278521721

   @ZanderXu Thanks for helping to review the code. Can you help merge this pr into trunk branch?


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[GitHub] [hadoop] hadoop-yetus commented on pull request #4714: HADOOP-18395 Performance improvement in org.apache.hadoop.io.Text#find

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #4714:
URL: https://github.com/apache/hadoop/pull/4714#issuecomment-1207386452

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] huxinqiu closed pull request #4714: HADOOP-18395. Performance improvement in hadoop-common Text#find

Posted by GitBox <gi...@apache.org>.
huxinqiu closed pull request #4714: HADOOP-18395. Performance improvement in hadoop-common Text#find
URL: https://github.com/apache/hadoop/pull/4714


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[GitHub] [hadoop] hadoop-yetus commented on pull request #4714: HADOOP-18395 Performance improvement in org.apache.hadoop.io.Text#find

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #4714:
URL: https://github.com/apache/hadoop/pull/4714#issuecomment-1207831475

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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Re: [PR] HADOOP-18395. Performance improvement in hadoop-common Text#find [hadoop]

Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #4714:
URL: https://github.com/apache/hadoop/pull/4714#issuecomment-1778630515

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] huxinqiu commented on pull request #4714: HADOOP-18395. Performance improvement in hadoop-common Text#find

Posted by GitBox <gi...@apache.org>.
huxinqiu commented on PR #4714:
URL: https://github.com/apache/hadoop/pull/4714#issuecomment-1211521803

   @goiri Please help to review the code, Thank you very much!


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[GitHub] [hadoop] hadoop-yetus commented on pull request #4714: HADOOP-18395. Performance improvement in hadoop-common Text#find

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #4714:
URL: https://github.com/apache/hadoop/pull/4714#issuecomment-1366571276

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  41m 29s |  |  trunk passed  |
   | +1 :green_heart: |  compile  |  25m 22s |  |  trunk passed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
   | +1 :green_heart: |  compile  |  21m 50s |  |  trunk passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
   | +1 :green_heart: |  checkstyle  |   1m  6s |  |  trunk passed  |
   | +1 :green_heart: |  mvnsite  |   1m 38s |  |  trunk passed  |
   | -1 :x: |  javadoc  |   1m  9s | [/branch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4714/1/artifact/out/branch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt) |  hadoop-common in trunk failed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.  |
   | +1 :green_heart: |  javadoc  |   0m 42s |  |  trunk passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
   | +1 :green_heart: |  spotbugs  |   2m 43s |  |  trunk passed  |
   | +1 :green_heart: |  shadedclient  |  24m 54s |  |  branch has no errors when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   1m  0s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |  24m 37s |  |  the patch passed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04  |
   | +1 :green_heart: |  javac  |  24m 37s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |  21m 45s |  |  the patch passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
   | +1 :green_heart: |  javac  |  21m 45s |  |  the patch passed  |
   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks issues.  |
   | +1 :green_heart: |  checkstyle  |   1m  0s |  |  the patch passed  |
   | +1 :green_heart: |  mvnsite  |   1m 34s |  |  the patch passed  |
   | -1 :x: |  javadoc  |   0m 59s | [/patch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4714/1/artifact/out/patch-javadoc-hadoop-common-project_hadoop-common-jdkUbuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.txt) |  hadoop-common in the patch failed with JDK Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04.  |
   | +1 :green_heart: |  javadoc  |   0m 41s |  |  the patch passed with JDK Private Build-1.8.0_352-8u352-ga-1~20.04-b08  |
   | +1 :green_heart: |  spotbugs  |   2m 41s |  |  the patch passed  |
   | +1 :green_heart: |  shadedclient  |  25m  4s |  |  patch has no errors when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  18m 27s |  |  hadoop-common in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 53s |  |  The patch does not generate ASF License warnings.  |
   |  |   | 219m 52s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4714/1/artifact/out/Dockerfile |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4714 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
   | uname | Linux 337f86e92d51 4.15.0-200-generic #211-Ubuntu SMP Thu Nov 24 18:16:04 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / 49ae6cd5d835a5239c431fdd5bad60fc49266587 |
   | Default Java | Private Build-1.8.0_352-8u352-ga-1~20.04-b08 |
   | Multi-JDK versions | /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.17+8-post-Ubuntu-1ubuntu220.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_352-8u352-ga-1~20.04-b08 |
   |  Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4714/1/testReport/ |
   | Max. process+thread count | 2563 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common |
   | Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4714/1/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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