global sort: bench new merge step

[ywqzzy]

What problem does this PR solve?

Issue Number: ref #48952

Problem Summary:

bench merge step with different implementation and concurrency.

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

  requests:
  cpu: 15000m
  memory: 56Gi
  storage: 3500Gi

bench_test.go:969: merge speed for 1310720900 bytes in 15.208387281s with 1 concurrency, speed: 82.19 MB/s, ascending file
bench_test.go:969: merge speed for 1310720900 bytes in 9.597459202s with 1 concurrency, speed: 130.24 MB/s, random file
bench_test.go:969: merge speed for 1310720900 bytes in 8.137010907s with 2 concurrency, speed: 153.62 MB/s, ascending file
bench_test.go:969: merge speed for 1310720900 bytes in 6.131138584s with 2 concurrency, speed: 203.88 MB/s, random file
bench_test.go:969: merge speed for 1310720900 bytes in 5.028285528s with 4 concurrency, speed: 248.59 MB/s, ascending file
bench_test.go:969: merge speed for 1310720900 bytes in 4.41710165s with 4 concurrency, speed: 282.99 MB/s, random file
bench_test.go:969: merge speed for 1310720900 bytes in 5.049378811s with 8 concurrency, speed: 247.56 MB/s, ascending file
bench_test.go:969: merge speed for 1310720900 bytes in 3.869761845s with 8 concurrency, speed: 323.02 MB/s, random file
bench_test.go:1017: new merge speed for 1310720900 bytes in 6.763902622s, speed: 184.80 MB/s, ascending file
bench_test.go:1017: new merge speed for 1310720900 bytes in 5.82777614s, speed: 214.49 MB/s, random file

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

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[codecov]

Codecov Report

Merging #49595 (ff9962e) into master (7d33d0d) will increase coverage by 0.4612%.
Report is 2 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #49595        +/-   ##
================================================
+ Coverage   71.0024%   71.4636%   +0.4612%     
================================================
  Files          1368       1421        +53     
  Lines        399178     415723     +16545     
================================================
+ Hits         283426     297091     +13665     
- Misses        95967      99833      +3866     
+ Partials      19785      18799       -986     

Flag	Coverage Δ
integration	43.6693% <ø> (?)
unit	71.0024% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.9663% <ø> (ø)
parser	∅ <ø> (∅)
br	47.3644% <ø> (-5.5178%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, lance6716

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-20 04:11:05.658430365 +0000 UTC m=+1020556.695657293: ☑️ agreed by D3Hunter.
• 2023-12-20 05:00:46.369607581 +0000 UTC m=+1023537.406834507: ☑️ agreed by lance6716.