[conghuhu]

Purpose of the PR

• We currently miss a benchmark to compare some performance components, such as concurrent map.
• I have added a simple example to compare the random read and write performance between IntMapBySegments and ConcurrentHashMap

Result as follows, the performance of IntMapBySegments is very good:

Main Changes

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • xxx

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[conghuhu]

@imbajin @javeme PTAL

[codecov]

Codecov Report

Merging #2238 (b93289c) into master (8ee3d32) will decrease coverage by 7.35%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##             master    #2238      +/-   ##
============================================
- Coverage     65.03%   57.69%   -7.35%     
+ Complexity      979      657     -322     
============================================
  Files           498      498              
  Lines         40682    40684       +2     
  Branches       5681     5681              
============================================
- Hits          26458    23472    -2986     
- Misses        11596    14781    +3185     
+ Partials       2628     2431     -197     

Impacted Files	Coverage Δ
...a/org/apache/hugegraph/util/collection/IntMap.java	45.63% <33.33%> (-26.77%)	⬇️

... and 107 files with indirect coverage changes

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[simon824]

We need check and add license files when adding 3rd-party dependencies, refer to document.

[javeme]

LGTM

[imbajin]

@conghuhu could also open a summary issue for this task, and link this PR as the subtask 🔢

and also could update the doc to link the summary issue

[imbajin]

Another CI error TODO alert:

@conghuhu could u help to fix it when free~