mxsm commented on PR #5592:
URL: https://github.com/apache/rocketmq/pull/5592#issuecomment-1326509814
## After
```
# JMH version: 1.35
# VM version: JDK 1.8.0_342, OpenJDK 64-Bit Server VM, 25.342-b07
# VM invoker: /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
# VM options: <none>
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# Warmup: 3 iterations, 2 s each
# Measurement: 3 iterations, 4 s each
# Timeout: 10 min per iteration
# Threads: 8 threads, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: com.github.mxsm.TimeZoneBenchmark.timeZoneNonSynchronized
# Run progress: 0.00% complete, ETA 00:00:18
# Fork: 1 of 1
# Warmup Iteration 1: 5399393.834 ops/s
# Warmup Iteration 2: 6425872.682 ops/s
# Warmup Iteration 3: 7142158.397 ops/s
Iteration 1: 7161349.525 ops/s
·stack: <delayed till summary>
Iteration 2: 7133167.489 ops/s
·stack: <delayed till summary>
Iteration 3: 7089499.965 ops/s
·stack: <delayed till summary>
Result "com.github.mxsm.TimeZoneBenchmark.timeZoneNonSynchronized":
7128005.660 ±(99.9%) 660456.318 ops/s [Average]
(min, avg, max) = (7089499.965, 7128005.660, 7161349.525), stdev =
36201.839
CI (99.9%): [6467549.342, 7788461.978] (assumes normal distribution)
Secondary result
"com.github.mxsm.TimeZoneBenchmark.timeZoneNonSynchronized:·stack":
Stack profiler:
....[Thread state
distributions]....................................................................
99.7% RUNNABLE
0.3% WAITING
....[Thread state:
RUNNABLE]........................................................................
22.3% 22.4% sun.util.calendar.ZoneInfo.getTransitionIndex
14.3% 14.4% java.text.SimpleDateFormat.format
12.3% 12.3% java.text.DateFormatSymbols.<init>
10.2% 10.2% java.lang.StringBuilder.getChars
9.3% 9.3% java.util.GregorianCalendar.computeFields
7.8% 7.8% java.text.SimpleDateFormat.subFormat
6.4% 6.4% java.time.ZoneId.systemDefault
6.4% 6.4% java.util.GregorianCalendar.computeTime
5.0% 5.0% java.text.SimpleDateFormat.initializeDefaultCentury
1.3% 1.3% org.openjdk.jmh.infra.Blackhole.consume
4.4% 4.4% <other>
....[Thread state:
WAITING].........................................................................
0.3% 100.0% sun.misc.Unsafe.park
# Run complete. Total time: 00:00:18
REMEMBER: The numbers below are just data. To gain reusable insights, you
need to follow up on
why the numbers are the way they are. Use profilers (see -prof, -lprof),
design factorial
experiments, perform baseline and negative tests that provide experimental
control, make sure
the benchmarking environment is safe on JVM/OS/HW level, ask for reviews
from the domain experts.
Do not assume the numbers tell you what you want them to tell.
Benchmark Mode Cnt Score
Error Units
TimeZoneBenchmark.timeZoneNonSynchronized thrpt 3 7128005.660 ±
660456.318 ops/s
TimeZoneBenchmark.timeZoneNonSynchronized:·stack thrpt NaN
---
```
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