Report 📊

Summary

The analysis of the Gradle build performance data between variants 9.3.1 and 9.4.0 reveals minor differences in build times and resource usage. The overall build time for variant 9.3.1 averaged 395.328 seconds, slightly longer than the 394.733 seconds for variant 9.4.0, a marginal improvement of about 0.15%. Configuration times are also nearly identical, with variant 9.3.1 being marginally slower by about 0.29%. In terms of resource usage, both CPU and memory metrics for the build processes are closely matched between the two variants, indicating no significant change in resource efficiency. The most time-consuming tasks across both variants include :app:app:mergeExtDexDebug, :app:app:hiltJavaCompileDebug, and :app:app:mergeDebugResources, with variant 9.4.0 showing slight improvements in execution times for these tasks.

Detailed Report

1. Build Time Comparison

  • Overall Build Time:

    • Mean: Variant 9.3.1: 395.328s, Variant 9.4.0: 394.733s (0.15% faster)
    • P50: Variant 9.3.1: 393.697s, Variant 9.4.0: 395.294s
    • P90: Variant 9.3.1: 417.893s, Variant 9.4.0: 413.769s

  • Configuration Time:

    • Mean: Variant 9.3.1: 54.547s, Variant 9.4.0: 54.387s (0.29% faster)
    • P50: Variant 9.3.1: 53.446s, Variant 9.4.0: 53.376s
    • P90: Variant 9.3.1: 64.625s, Variant 9.4.0: 61.713s

2. Task Type Differences

  • Top Time-Consuming Tasks:
    • "com.android.build.gradle.internal.tasks.DexMergingTask" shows a slight increase in mean execution time from 4798ms in 9.3.1 to 4875ms in 9.4.0.
    • "com.android.build.gradle.internal.tasks.ValidateSigningTask" shows a decrease from 1100ms in 9.3.1 to 1008ms in 9.4.0.
    • "org.jetbrains.kotlin.gradle.tasks.KotlinCompile" has a minor decrease from 1836ms in 9.3.1 to 1824ms in 9.4.0.

3. Statistical Patterns

  • Notable Timing Variations:
    • "com.android.build.gradle.internal.tasks.DexMergingTask" and "com.android.build.gradle.internal.tasks.ValidateSigningTask" show more than 10% variation in P90 times, indicating variability in more complex builds.

4. CPU & Memory Usage Analysis

  • CPU Usage:

    • All processes: Both variants peaked at 100% CPU usage.
    • Build process: Variant 9.3.1 had a maximum of 96.18%, and 9.4.0 had 96.42%.
    • Build child processes: Slightly higher in 9.4.0 (93.80%) compared to 9.3.1 (93.68%).

  • Memory Usage:

    • All processes: Maximum memory usage was slightly lower in 9.4.0 (9.87GB) compared to 9.3.1 (9.92GB).
    • Build process memory: Also showed a minor decrease from 5.25GB in 9.3.1 to 5.19GB in 9.4.0.
    • Build child processes memory: Remained nearly constant with 3.66GB in 9.3.1 and 3.67GB in 9.4.0.

6. Garbage Collection Analysis

  • Total GC Collections: Increased from 171 in 9.3.1 to 176 in 9.4.0, suggesting a slight increase in garbage collection activities which could indicate more object churn in the newer version.

7. Kotlin Build Reports Analysis

  • Incremental Compilation in Daemon: Slightly faster in 9.4.0 with a mean time of 1639.23ms compared to 1650.17ms in 9.3.1.
  • Compiler Translation to IR and Code Generation: Both showed negligible differences between the variants, indicating stable compiler performance.

Overall, the transition from variant 9.3.1 to 9.4.0 shows very minor improvements in build performance and efficiency, with specific tasks and resource usage showing slightly better metrics in the newer version.