Report đź“Š

Summary

The analysis of the Gradle build performance comparison between variants 9.3.1 and 9.4.0-rc-1 reveals a slight increase in overall build time by approximately 4.6 seconds (0.9% increase). The configuration time also saw a minor increase of about 1.02 seconds (2.3% increase). Notably, the top three most time-consuming tasks across both variants were :core:cart:kspDebugKotlin, :core:contact:kspDebugKotlin, and :core:comment:kspDebugKotlin, with marginal increases in their execution times in the newer variant. Memory usage across all processes slightly decreased in the newer variant, while CPU usage remained maximally utilized at 100% for all processes. The total garbage collection counts increased in the newer variant, suggesting a potential area for optimization.

Detailed Report

1. Build Time Comparison

  • Overall Build Time:

    • Mean: Increased from 503.917s to 508.496s (0.9% increase, 4.579s more).
    • P50: Increased from 499.491s to 503.940s.
    • P90: Increased from 526.273s to 539.733s.

  • Configuration Time:

    • Mean: Increased from 45.383s to 46.405s (2.3% increase, 1.022s more).
    • P50: Increased from 44.998s to 45.421s.
    • P90: Increased from 49.567s to 50.707s.

2. Task Type Differences

  • Top 3 Time-Consuming Tasks:
    • "org.jetbrains.kotlin.gradle.tasks.KotlinCompile": Slight increase from 2541ms to 2547ms.
    • "com.google.devtools.ksp.gradle.KspAATask": Increased from 3672ms to 3718ms.
    • "com.android.build.gradle.internal.res.LinkApplicationAndroidResourcesTask": Decreased from 2098ms to 2088ms.

3. Statistical Patterns

  • Tasks like "org.jetbrains.kotlin.gradle.tasks.KotlinCompile" and "com.google.devtools.ksp.gradle.KspAATask" showed consistent increases across mean, P50, and P90 values, indicating a trend of increased task execution times in the newer variant.

4. Process State Analysis

  • Kotlin Process State:

    • Slight increase in garbage collection time from 0.19 to 0.2.

  • Gradle Process State:

    • Gradle process garbage collection time increased from 0.44 to 0.45.

5. CPU & Memory Usage Analysis

  • All Processes:

    • CPU Usage: Maxed at 100% for both variants.
    • Memory Usage: Slightly decreased from 13.0GB to 12.9GB.

  • Build Process:

    • CPU Usage: Remained high at around 97% for both variants.
    • Memory Usage: Slightly decreased from 8.19GB to 8.13GB.

  • Build Child Processes:

    • CPU Usage: Increased slightly from 94.52% to 94.72%.
    • Memory Usage: Decreased from 3.88GB to 3.86GB.

6. Garbage Collection Analysis

  • Total garbage collection counts increased from 227 to 233, suggesting more frequent memory management activities in the newer variant.

7. Kotlin Build Reports Analysis

  • Compiler Execution Stages Comparison:

    • Slight increases in times for stages like “Compiler code analysis” and “Compiler IR lowering”.
    • “Run compilation” time increased from 2330.48ms to 2336.23ms.

  • Incremental Compilation Insights:

    • Incremental compilation time in daemon slightly increased from 2308.65ms to 2314.4ms.

  • Compilation Performance Metrics:

    • “Code generation lines per second” slightly decreased from 1021 to 1014.
    • “Analysis lines per second” decreased from 696 to 689.

This detailed analysis highlights the areas where the newer variant of the build process has increased resource usage and execution times, suggesting potential areas for optimization to enhance performance.