Report 📊

Summary

The analysis of the Gradle build performance data reveals a notable improvement in overall build times when comparing variant B (metro_0_3_2) to variant A (anvil). Specifically, variant B is faster by approximately 6.7 seconds (26.012s for A vs. 19.291s for B), translating to a 25.8% decrease in build time. This improvement is consistent across the 50th and 90th percentiles as well. In task execution, the :app-scaffold:compileDebugKotlin task shows a significant increase in execution time in variant B, while :app-scaffold:kspDebugKotlin is notably faster. The Kotlin build reports highlight a substantial increase in IR translation time for variant B, suggesting a potential area for optimization. Memory and CPU usage are slightly higher in variant B for all processes, with the build child processes in variant B utilizing significantly more CPU resources. Lastly, garbage collection data indicates fewer total collections in variant B, suggesting more efficient memory management.

Detailed Report

1. Build Time Comparison

  • Mean Build Time: Variant A: 26.012s, Variant B: 19.291s (25.8% faster)
  • P50 Build Time: Variant A: 24.497s, Variant B: 18.205s (25.7% faster)
  • P90 Build Time: Variant A: 31.493s, Variant B: 23.995s (23.8% faster)

2. Task Type Differences

  • Top 3 time-consuming tasks for Variant A:

    • :app-scaffold:compileDebugKotlin: Mean: 5.342s, P50: 5.024s, P90: 6.243s
    • :libraries:summarizer:compileReleaseKotlin: Mean: 1.534s, P50: 1.384s, P90: 2.351s
    • :libraries:compose-extensions:compileReleaseKotlin: Mean: 1.510s, P50: 1.330s, P90: 2.169s

  • Comparison in Variant B:

    • :app-scaffold:compileDebugKotlin: Mean: 6.088s (14.0% increase), P50: 5.795s, P90: 7.429s
    • :libraries:summarizer:compileReleaseKotlin: Mean: 1.754s (14.3% increase), P50: 1.579s, P90: 2.493s
    • :libraries:compose-extensions:compileReleaseKotlin: Mean: 1.633s (8.1% increase), P50: 1.531s, P90: 2.347s

3. Statistical Patterns

  • Notable timing variations:
    • :app-scaffold:kspDebugKotlin: Variant A: 1.470s vs. Variant B: 1.053s (28.4% faster in B)
    • :app-scaffold:compileDebugKotlin: Variant A: 5.342s vs. Variant B: 6.088s (14.0% slower in B)

5. CPU & Memory Usage Analysis

  • All Processes:
    • CPU Max: Both variants peak at 100%.
    • Memory Max: Variant A: 8.61 GB, Variant B: 8.8 GB (2.2% increase)
  • Build Process:
    • CPU Max: Variant A: 89.29%, Variant B: 86.74% (2.9% decrease)
    • Memory Max: Variant A: 4.0 GB, Variant B: 4.41 GB (10.3% increase)
  • Build Child Processes:
    • CPU Max: Variant A: 70.26%, Variant B: 80.81% (15.0% increase)
    • Memory Max: Variant A: 3.6 GB, Variant B: 3.41 GB (5.3% decrease)

6. Garbage Collection Analysis

  • Gradle GC Collections: Variant A: 546, Variant B: 441 (19.2% decrease)
  • Kotlin GC Collections: Variant A: 240, Variant B: 224 (6.7% decrease)

7. Kotlin Build Reports Analysis

  • Compiler IR Translation: Variant A: 379.2ms vs. Variant B: 649.8ms (71.3% increase in B)
  • Incremental Compilation in Daemon: Variant A: 1020.79ms vs. Variant B: 1233.37ms (20.8% increase in B)
  • Code Generation Lines per Second: Variant A: 5242 vs. Variant B: 4101 (21.8% decrease in B)