Report 📊

Summary

The analysis of the Gradle build performance data reveals subtle yet insightful differences between two Kotlin variants, varianta_kotlin_2.1.21 and variantb_kotlin_2.2.0. The overall build time shows a slight improvement in variantb by approximately 0.42 seconds (0.4% faster). Notably, the most time-consuming tasks across variants include :layer_0:module_0_1:kspDebugKotlin, :layer_0:module_0_10:kspDebugKotlin, and :layer_0:module_0_12:kspDebugKotlin, with variantb generally showing marginal increases in execution times. CPU and memory usage are closely matched between the variants, with variantb showing a slight increase in maximum memory usage by about 0.09 GB. Garbage collection metrics indicate a very similar performance, with total collections slightly lower in variantb. The Kotlin Build Reports highlight a faster compiler code generation and analysis in variantb, suggesting efficiency improvements in the newer Kotlin version.

Detailed Report

1. Build Time Comparison

  • Mean Build Time: varianta 575.195s, variantb 572.772s (0.4% faster by 2.423s)
  • P50 Build Time: varianta 569.609s, variantb 571.418s
  • P90 Build Time: varianta 601.128s, variantb 600.337s

2. Task Type Differences

  • Top Tasks:
    • :layer_0:module_0_1:kspDebugKotlin has a mean time of 10,011ms in varianta vs. 10,184ms in variantb.
    • :layer_0:module_0_10:kspDebugKotlin shows 9,226ms in varianta vs. 9,416ms in variantb.
    • :layer_0:module_0_12:kspDebugKotlin recorded 7,955ms in varianta vs. 8,149ms in variantb.

3. Statistical Patterns

  • Notable Variations:
    • :layer_0:module_0_1:kspDebugKotlin and :layer_0:module_0_10:kspDebugKotlin show an increase in execution time in variantb by about 1.73% and 2.06% respectively, indicating slightly slower performance for these tasks in the newer Kotlin version.

4. CPU & Memory Usage Analysis

  • CPU Usage:
    • All processes maxed out at 100% CPU usage for both variants.
    • Build process CPU usage was nearly identical with a max of 96.325% for varianta and 96.4% for variantb.
  • Memory Usage:
    • All processes peaked at 11.27GB for varianta and 11.36GB for variantb.
    • Build process memory usage was almost the same, with a slight increase in variantb to 4.93GB.

5. Garbage Collection Analysis

  • Total GC Collections:
    • Gradle process: varianta had 203 collections vs. variantb with 202 collections.
    • Kotlin process: varianta had 162 collections vs. variantb with 165 collections.

6. Kotlin Build Reports Analysis

  • Compiler Performance:
    • Code generation lines per second were higher in variantb (1090 vs. 1044 in varianta).
    • Analysis lines per second also improved in variantb (1081 vs. 982 in varianta).

This analysis underscores the nuanced improvements in build performance and efficiency in the newer Kotlin version, variantb_kotlin_2.2.0, particularly in compiler operations, despite slightly increased execution times for specific tasks.