Summary
The performance comparison between two Gradle build variants, varianta_main_r8
and variantb_r8_different_process
, reveals several key differences. The overall build time for variantb_r8_different_process
is slightly higher by approximately 10.6 seconds (2.04% increase) compared to varianta_main_r8
. Notably, variantb_r8_different_process
shows a significant increase in memory usage, with a maximum of 14.24 GB compared to 11.2 GB for varianta_main_r8
, marking a 27.14% increase. Additionally, variantb_r8_different_process
has fewer total garbage collection (GC) events in the Gradle process but more in the Kotlin process, suggesting different memory management behaviors. The R8Task
and L8DexDesugarLibTask
are among the most time-consuming tasks, with variantb_r8_different_process
showing longer execution times, especially in L8DexDesugarLibTask
where the mean time increased by over 47%.
Detailed Report
1. Build Time Comparison
- Mean Build Time:
varianta_main_r8
: 519.017 secondsvariantb_r8_different_process
: 529.645 seconds- Difference: +10.628 seconds (+2.04%)
- P50 Build Time:
varianta_main_r8
: 516.637 secondsvariantb_r8_different_process
: 524.536 seconds
- P90 Build Time:
varianta_main_r8
: 537.050 secondsvariantb_r8_different_process
: 551.347 seconds
2. Task Type Differences
- Top 3 Time-Consuming Tasks:
"R8Task"
:varianta_main_r8
: Mean: 180.886 seconds, P50: 179.733 seconds, P90: 262.373 secondsvariantb_r8_different_process
: Mean: 183.153 seconds, P50: 206.333 seconds, P90: 264.743 seconds
"L8DexDesugarLibTask"
:varianta_main_r8
: Mean: 23.098 seconds, P50: 16.647 seconds, P90: 46.107 secondsvariantb_r8_different_process
: Mean: 34.003 seconds, P50: 29.022 seconds, P90: 59.783 seconds
"DexMergingTask"
:varianta_main_r8
: Mean: 19.908 seconds, P50: 19.256 seconds, P90: 23.524 secondsvariantb_r8_different_process
: Mean: 21.653 seconds, P50: 22.247 seconds, P90: 27.910 seconds
3. Statistical Patterns
- Significant timing variations observed in
"L8DexDesugarLibTask"
with over 47% increase in mean execution time invariantb_r8_different_process
. - The
"R8Task"
shows a substantial increase in P50 values invariantb_r8_different_process
, indicating higher median build times.
4. Process State Analysis
- Kotlin Process State:
- Slight increase in garbage collection time in
variantb_r8_different_process
.
- Slight increase in garbage collection time in
- Gradle Process State:
- Lower garbage collection times in
variantb_r8_different_process
.
- Lower garbage collection times in
5. CPU & Memory Usage Analysis
- Overall System Usage:
- CPU usage maxed at 100% for both variants.
- Memory usage was significantly higher in
variantb_r8_different_process
(14.24 GB max) compared tovarianta_main_r8
(11.2 GB max).
- Main Gradle Process:
- Similar CPU usage patterns.
- Slightly lower memory usage in
variantb_r8_different_process
.
- Build Child Processes:
- Higher memory usage in
variantb_r8_different_process
(up to 8.32 GB).
- Higher memory usage in
6. Garbage Collection Analysis
- Total GC Collections:
- Gradle process: 233 for
varianta_main_r8
vs. 112 forvariantb_r8_different_process
. - Kotlin process: 45 for
varianta_main_r8
vs. 52 forvariantb_r8_different_process
.
- Gradle process: 233 for
7. Kotlin Build Reports Analysis
- Incremental compilation time shows an increase in
variantb_r8_different_process
. - Code generation and analysis lines per second were lower in
variantb_r8_different_process
, indicating less efficiency in these areas.
The data indicates that while variantb_r8_different_process
has a slightly slower build time and higher memory usage, it benefits from fewer GC events in the Gradle process, potentially indicating more efficient memory management in some areas but not universally across all metrics.