8354791: Use Hashtable.putIfAbsent in CSS constructor

[turbanoff]

We can use Hashtable.putIfAbsent instead of pair get/put methods.
It's faster and cleaner.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8354791: Use Hashtable.putIfAbsent in CSS constructor (Enhancement - P5)

Reviewers

• Alexey Ivanov (@aivanov-jdk - Reviewer) Review applies to 64cf26d9
• Sergey Bylokhov (@mrserb - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/22032/head:pull/22032
$ git checkout pull/22032

Update a local copy of the PR:
$ git checkout pull/22032
$ git pull https://git.openjdk.org/jdk.git pull/22032/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 22032

View PR using the GUI difftool:
$ git pr show -t 22032

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Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/22032.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back aturbanov! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@turbanoff This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8354791: Use Hashtable.putIfAbsent in CSS constructor

Reviewed-by: serb, aivanov

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 2413 new commits pushed to the master branch:

• 1652948: 8355442: Reference field lambda forms with type casts are not generated
• 5e27547: 8355789: GenShen: assert(_degen_point == ShenandoahGC::_degenerated_unset) failed: Should not be set yet: Outside of Cycle
• 6850757: 8355689: Wrong native entry name for FloatMaxVector vector math stubs with -XX:MaxVectorSize=8
• ... and 2410 more: https://git.openjdk.org/jdk/compare/cbf4dd588bf371e13e81204b1585d34bfadddb42...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[openjdk]

@turbanoff The following label will be automatically applied to this pull request:

• client

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[bridgekeeper]

@turbanoff This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply add a new comment to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[bridgekeeper]

@turbanoff This pull request has been inactive for more than 8 weeks and will now be automatically closed. If you would like to continue working on this pull request in the future, feel free to reopen it! This can be done using the /open pull request command.

[turbanoff]

/open

[openjdk]

@turbanoff This pull request is now open

[mlbridge]

Webrevs

• 01: Full - Incremental (5de8c8f7)
• 00: Full (64cf26d9)

[turbanoff]

Any more reviews ?

[turbanoff]

/integrate

[openjdk]

Going to push as commit 0110aca.
Since your change was applied there have been 2421 commits pushed to the master branch:

• 526951d: 8354145: G1: UseCompressedOops boundary is calculated on maximum heap region size instead of maxiumum ergonomic heap region size
• 765cef4: 8355878: RISC-V: jdk/incubator/vector/DoubleMaxVectorTests.java fails when using RVV
• d802fd0: 8352422: [ubsan] Out-of-range reported in ciMethod.cpp:917:20: runtime error: 2.68435e+09 is outside the range of representable values of type 'int'
• ... and 2418 more: https://git.openjdk.org/jdk/compare/cbf4dd588bf371e13e81204b1585d34bfadddb42...master

Your commit was automatically rebased without conflicts.

[openjdk]

@turbanoff Pushed as commit 0110aca.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

[aivanov-jdk]

I ran the client tests again two days ago, the CI was green.