Workspace: remove uncessary parallelism in BlazeConfigurationResolver

[LeFrosch]

The computation in createResolveConfiguration is so cheap that it is not worth the overhead doing it in parallel (and makes it easier to read the code).

[gemini-code-assist]

Summary of Changes

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This pull request streamlines the BlazeConfigurationResolver by eliminating unnecessary parallel processing for a low-cost computation. The change simplifies the code, enhancing readability and maintainability, without negatively impacting performance.

Highlights

• Removed unnecessary parallelism: The parallel execution of createResolveConfiguration within buildBlazeConfigurationData was removed. The computation was deemed inexpensive, making the overhead of parallelism unwarranted and simplifying the code.

Changelog

• cpp/src/com/google/idea/blaze/cpp/BlazeConfigurationResolver.java
  • Removed imports related to concurrent operations (e.g., ListenableFuture, Callable, ConcurrentMap, Maps, Futures, Collectors).
  • Added an import for java.util.HashMap.
  • Refactored the buildBlazeConfigurationData method to process target configurations sequentially using a standard HashMap instead of concurrent execution.
  • Deleted the submit helper method previously used for submitting tasks to an executor.
  • Updated variable declarations in findEquivalenceClasses to use final var for improved readability.

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[gemini-code-assist]

Code Review

This pull request effectively removes unnecessary parallelism from the buildBlazeConfigurationData method in BlazeConfigurationResolver.java. As stated in the pull request description, the createResolveConfiguration computation is cheap, making the overhead of parallel processing unwarranted. The refactoring simplifies the code significantly by replacing concurrent data structures and asynchronous execution with a more straightforward sequential approach using a HashMap and stream forEach. This change improves readability and maintainability without impacting performance negatively for this specific operation. The removal of the explicit (ScopedOperation) cast also contributes to cleaner code.