Module rearange and add kotlin benchmark

[jinia91]

Summary

I suggest some modifications to the current structure to facilitate benchmark testing of the fixture-monkey-kotlinmodule using JMH

1. To ensure consistent results, use the same class and use the java-test-fixtures plugin for code reuse.

2. make new module fixture-monkey-benchmarks for aggregating sub-benchmark-module.

3. Due to some local compile issues when defining Java classes within the Kotlin module, move the ExpressionGeneratorJavaTestSpecs.java to a Java package in fixture-monkey-kotlin.

4. Add default benchmark samples to the fixture-monkey-kotlin module.

   For a proper comparison, the sample test cases are planned as follows:
   
   1. Benchmark for initializing Java classes in Kotlin
   2. Benchmark for initializing Kotlin classes in Kotlin
   3. Benchmark for initializing composite classes with Kotlin-Java internal references (todo)

5. Modify the GitHub Actions workflow for benchmark reporting.

How Has This Been Tested?

Local Build and Ci Pipline

Is the Document updated?

no need

[seongahjo]

How about adding a new module to benchmark?

[jinia91]

How about adding a new module to benchmark?

Im considering two approaches

• first, make new module for benchmark integration testing
• second, performing benchmark testing for each module separately and collect just reporting.

From the perspective of ~scalability~ Flexibility , choice second approach.

However, I'm not entirely confident due to the downside of increased dependency complexity.

[jinia91]

fixture-monkey Benchmark	Mode	Threads	Samples	Score	Score Error (99.9%)	Unit
ManipulationBenchmark.fixed	avgt	1	10	576.165762	2.457355	ms/op
ManipulationBenchmark.thenApply	avgt	1	10	1301.278260	5.921343	ms/op
ObjectGenerationBenchmark.beanGenerateOrderSheetWithFixtureMonkey	avgt	1	10	596.718850	5.575784	ms/op
ObjectGenerationBenchmark.builderGenerateOrderSheetWithFixtureMonkey	avgt	1	10	505.365829	3.092013	ms/op
ObjectGenerationBenchmark.fieldReflectionGenerateOrderSheetWithFixtureMonkey	avgt	1	10	572.670919	6.588839	ms/op
ObjectGenerationBenchmark.jacksonGenerateOrderSheetWithFixtureMonkey	avgt	1	10	607.734411	4.826412	ms/op
fixture-monkey-kotlin Module Benchmark	Mode	Threads	Samples	Score	Score Error (99.9%)	Unit
KotlinObjectGenerationBenchMark.beanGenerateJavaOrderSheetWithFixtureMonkey	avgt	1	10	1029.619206	21.428195	ms/op
KotlinObjectGenerationBenchMark.beanGenerateKotlinOrderSheetWithFixtureMonkey	avgt	1	10	980.861308	14.237564	ms/op

[seongahjo]

I'm sure you've given it a lot of thought. Can you tell me about a specific situation where flexibility is critical? I have no idea so far. I'm not sure about it is worth than complex dependency.

[jinia91]

Currently, the execution speed of performance bench check feels too slow, leading to a decrease in productivity.

With the current PR, as adding just two of kotlin benchmarking, there has been an increase of over 4 minutes.

As fixture-monkey continues to expand with more tests being added, i expect to take more times in future.

so, in near future, try to various pipelines such as:

• Running only some benchmarks based on module changes
• Executing each benchmark in parallel and so on...etc..

are expected to be considered.

In such cases, big one module for benchmark might lead to break changes.

Of course, this is just speculative in my opinion, and the problems of increased dependency complexity and management points cannot be ignored.

[seongahjo]

Oh, I see, thank you for your detailed explanation. Yes, I agree that a large module leads to bad for performance, which is bad for productivity. Then how about a new module that contains sub benchmark modules like fixture-monkey-tests?

[jinia91]

Oh, that sounds good.

There seems to be no need to place the benchmark testing module under the basic module structure unnecessarily. I will change the direction to manage under the fixture-monkey-benchmark each sub benchmark modules.

Thank you for the great idea.