Report 📊

Summary

The analysis of the Gradle build performance comparison between variant A (Gradle 9.1.0) and variant B (Gradle 9.2.0-rc-1) reveals subtle improvements in build efficiency in the newer version. The overall build time slightly decreased from 544.528 seconds in variant A to 542.012 seconds in variant B, a reduction of approximately 2.516 seconds (0.46%). Similarly, configuration time saw a reduction from 66.133 seconds to 64.152 seconds, improving by 1.981 seconds (3%). The most time-consuming tasks across both variants include :build-logic:convention:compileKotlin, :core:analytics:kspDebugKotlin, and :core:calendar:kspDebugKotlin, with minor variations in execution times between the variants.

CPU and memory usage remained nearly at capacity for both variants, with a maximum CPU usage of 100% and memory peaking around 11.6 GB. The garbage collection metrics indicate a slight decrease in total collections from 169 in variant A to 167 in variant B, suggesting marginally better memory management in the newer Gradle version.

Detailed Report

1. Build Time Comparison

  • Overall Build Time:

    • Variant A: Mean = 544.528s, P50 = 543.839s, P90 = 560.934s
    • Variant B: Mean = 542.012s, P50 = 543.043s, P90 = 556.369s
    • Reduction: Mean = 2.516s (0.46%), P50 = 0.796s (0.15%), P90 = 4.565s (0.81%)

  • Configuration Time:

    • Variant A: Mean = 66.133s, P50 = 64.745s, P90 = 68.875s
    • Variant B: Mean = 64.152s, P50 = 63.683s, P90 = 67.482s
    • Reduction: Mean = 1.981s (3%), P50 = 1.062s (1.64%), P90 = 1.393s (2.02%)

2. Task Type Differences

  • Top 3 Time-Consuming Tasks:
    • "org.jetbrains.kotlin.gradle.tasks.KotlinCompile": Mean = 1611ms in A vs 1614ms in B
    • "com.google.devtools.ksp.gradle.KspTaskJvm": Mean = 2730ms in A vs 2717ms in B
    • "com.android.build.gradle.internal.res.LinkApplicationAndroidResourcesTask": Mean = 2150ms in A vs 2097ms in B

3. Statistical Patterns

  • Tasks such as :build-logic:convention:compileKotlin and :core:analytics:kspDebugKotlin show slight increases in execution time in variant B, while others like :core:calendar:kspDebugKotlin remain consistent across both variants.

4. CPU & Memory Usage Analysis

  • All Processes:
    • CPU: Max = 100% for both variants
    • Memory: Max = 11.54 GB in A vs 11.6 GB in B
  • Build Process:
    • CPU: Max = 96.23% in A vs 96.37% in B
    • Memory: Max = 5.76 GB in A vs 5.83 GB in B
  • Build Child Processes:
    • CPU: Max = 95.1% in A vs 95.22% in B
    • Memory: Max = 4.85 GB in A vs 4.84 GB in B

6. Garbage Collection Analysis

  • Total GC collections slightly decreased from 169 in variant A to 167 in variant B, indicating a minor improvement in memory management.

Overall, the transition to Gradle 9.2.0-rc-1 shows marginal improvements in build time and configuration time, with consistent resource usage and slightly better garbage collection performance.