[jira] [Work logged] (GOBBLIN-1496) Predefine map and array sizes where possible for GaaS

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GOBBLIN-1496?focusedWorklogId=628032&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-628032 ]

ASF GitHub Bot logged work on GOBBLIN-1496:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 26/Jul/21 22:05
            Start Date: 26/Jul/21 22:05
    Worklog Time Spent: 10m 
      Work Description: Will-Lo opened a new pull request #3339:
URL: https://github.com/apache/gobblin/pull/3339


   …itial size if applicable
   
   Dear Gobblin maintainers,
   
   Please accept this PR. I understand that it will not be reviewed until I have checked off all the steps below!
   
   
   ### JIRA
   - [x] My PR addresses the following [Gobblin JIRA](https://issues.apache.org/jira/browse/GOBBLIN/) issues and references them in the PR title. For example, "[GOBBLIN-XXX] My Gobblin PR"
       - https://issues.apache.org/jira/browse/GOBBLIN-1496
   
   
   ### Description
   - [x] Here are some details about my PR, including screenshots (if applicable):
   GaaS has many scenarios with sparse/empty maps and lists. When initializing new data structures, we should initialize them to a certain size if we know the elements beforehand.
   
   ### Tests
   - [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   
   
   ### Commits
   - [x] My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
       1. Subject is separated from body by a blank line
       2. Subject is limited to 50 characters
       3. Subject does not end with a period
       4. Subject uses the imperative mood ("add", not "adding")
       5. Body wraps at 72 characters
       6. Body explains "what" and "why", not "how"
   
   


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 628032)
    Remaining Estimate: 0h
            Time Spent: 10m

> Predefine map and array sizes where possible for GaaS
> -----------------------------------------------------
>
>                 Key: GOBBLIN-1496
>                 URL: https://issues.apache.org/jira/browse/GOBBLIN-1496
>             Project: Apache Gobblin
>          Issue Type: Improvement
>            Reporter: William Lo
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> GaaS has many scenarios with sparse/empty maps and lists. When initializing new data structures, we should initialize them to a certain size if we know the elements beforehand.



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