Report 📊

Summary

The analysis of the Gradle build performance data reveals that variant B (kill_process_before_r8) generally performs better than variant A (r8). Specifically, the overall build time for variant B is shorter by approximately 8.3 seconds (1.7% improvement). This trend is consistent across various task types, where variant B often shows reduced execution times. Notably, the R8Task, one of the most time-consuming tasks, executes about 4.4 seconds faster in variant B. Memory usage is also slightly lower in variant B across all processes, with a maximum reduction of about 1.55 GB in overall system memory usage. CPU usage remains high and nearly maxed out for both variants, indicating a CPU-bound process.

Detailed Report

1. Build Time Comparison

  • Overall Build Time:

    • Variant A: Mean = 507.045s, P50 = 505.061s, P90 = 531.210s
    • Variant B: Mean = 498.696s, P50 = 495.041s, P90 = 520.179s
    • Improvement: Mean = 8.349s (1.7%), P50 = 10.02s (2.0%), P90 = 11.031s (2.1%)

  • Configuration Time:

    • Variant A: Mean = 46.039s, P50 = 44.979s, P90 = 49.190s
    • Variant B: Mean = 45.163s, P50 = 45.009s, P90 = 48.926s
    • Improvement: Mean = 0.876s (1.9%), P50 = -0.030s (-0.07%), P90 = 0.264s (0.5%)

2. Task Type Differences

  • Top 3 Time-Consuming Tasks:
    • "R8Task": Variant A Mean = 89.472s vs. Variant B Mean = 85.032s (4.44s faster in B)
    • "org.jetbrains.kotlin.gradle.tasks.KotlinCompile": Variant A Mean = 3.493s vs. Variant B Mean = 3.505s (0.012s slower in B)
    • "com.android.build.gradle.internal.lint.AndroidLintAnalysisTask": Variant A Mean = 3.561s vs. Variant B Mean = 3.254s (0.307s faster in B)

3. Statistical Patterns

  • Tasks with notable timing variations:
    • "R8Task" shows a consistent improvement in Variant B across all percentiles.
    • "AndroidLintAnalysisTask" also shows improved performance in Variant B, especially at the P50 level.

4. CPU & Memory Usage Analysis

  • All Processes:

    • CPU: Max usage is 100% for both variants.
    • Memory: Variant A Max = 11.8 GB, Variant B Max = 10.25 GB (1.55 GB less in B)

  • Build Process:

    • CPU: Variant A Max = 96.87%, Variant B Max = 96.83%
    • Memory: Variant A Max = 7.36 GB, Variant B Max = 7.34 GB

  • Build Child Processes:

    • CPU: Variant A Max = 94.13%, Variant B Max = 94.47%
    • Memory: Variant A Max = 3.56 GB, Variant B Max = 3.58 GB

5. Summary

Variant B shows a consistent improvement in build performance, particularly in overall build time and memory usage. The reduction in execution time for critical tasks like "R8Task" and "AndroidLintAnalysisTask" contributes significantly to this performance gain. Memory optimizations in Variant B also suggest better resource management, making it the preferable variant based on this data.