test: lazy create stats in runner

[LingyuCoder]

Summary

Should not call stats.toJson in test runner if __STATS__ is not used.

Before:

After:

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This pull request involves significant changes to the rspack-test-tools package, primarily focusing on modifying how compiler statistics are handled and passed around. The major changes include introducing a createStatsGetter method, updating various runner classes to use this new method, and altering test cases to reflect these changes.

Major Changes:

Enhancements to Statistics Handling:

• Introduced the createStatsGetter method in BasicRunnerFactory to cache and retrieve compiler statistics efficiently.
• Updated createRunner method in multiple runner classes (BasicRunnerFactory, MultipleRunnerFactory, NormalRunnerFactory, WatchRunnerFactory) to use the createStatsGetter method instead of directly passing statistics. [1] [2] [3] [4] [5] [6] [7]

Interface Changes:

• Modified IBasicRunnerOptions to use a function returning TCompilerStatsCompilation instead of directly using the type. [1] [2]

Test Case Updates:

• Updated test cases to use __STATS__ instead of STATS_JSON to align with the new statistics handling approach. [1] [2] [3] [4] [5] [6]

These changes improve the efficiency and consistency of how compiler statistics are accessed and used across different parts of the rspack-test-tools package.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[codspeed-hq]

CodSpeed Performance Report

Merging #9469 will not alter performance

_{Comparing test/lazy-runner-stats (68226ca) with main (334099c)}

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Summary

✅ 7 untouched benchmarks