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https://github.com/algomaster99/microbenchmarking-tutorial

Last synced: 29 days ago
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Host: GitHub
URL: https://github.com/algomaster99/microbenchmarking-tutorial
Owner: algomaster99
Created: 2024-06-12T18:26:45.000Z (7 months ago)
Default Branch: main
Last Pushed: 2024-06-14T08:25:41.000Z (7 months ago)
Last Synced: 2024-06-14T09:44:53.572Z (7 months ago)
Language: Java
Size: 13.7 KB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md

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README

# Microbenchmarking in Java

```java
// let's benchmark the creation of 1,000,000 dummy objects
Dummy.createNDummies(1000000);

// dummy
public static void createNDummies(int n) {
for (int i = 0; i < n; i++) {
Dummy dummy = new Dummy();
dummy.doNothing();
}
}
```

## Times without manual warmup

| | Only Interpreter | C1 | C2 | C1 & C2 |
|:---------:|:-------------------:|:----:|:---:|:---------:|
| Time (ms) | 139 | 24 | 6 | 13 |

## Times with manual warmup

| | Only Interpreter | C1 | C2 | C1 & C2 |
|:-------------------:|:----------------:|:--:|:--:|:-------:|
| Warmup Time (ms) | 106 | 24 | 5 | 12 |
| Execution Time (ms) | 101 | 14 | 0 | 3 |

> Interpreter always runs so JIT compiler's time also includes interpreter's time.

## Times with JMH warmup

### Only Interpreter

```text
Benchmark Mode Cnt Score Error Units
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies thrpt 16.822 ops/s
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies avgt 0.059 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies sample 170 0.059 ± 0.001 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.00 sample 0.056 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.50 sample 0.058 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.90 sample 0.063 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.95 sample 0.067 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.99 sample 0.081 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.999 sample 0.084 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p0.9999 sample 0.084 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies:p1.00 sample 0.084 s/op
_10MillionsOfDummy_OnlyInterpreter_JMH.createNDummies ss 0.065 s/op
```

### C1 & C2

```text
Benchmark Mode Cnt Score Error Units
_09MillionsOfDummy_C1C2_JMH.createNDummies thrpt 1770525516.073 ops/s
_09MillionsOfDummy_C1C2_JMH.createNDummies avgt ≈ 10⁻⁹ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies sample 240034 ≈ 10⁻⁸ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.00 sample ≈ 10⁻⁸ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.50 sample ≈ 10⁻⁸ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.90 sample ≈ 10⁻⁷ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.95 sample ≈ 10⁻⁷ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.99 sample ≈ 10⁻⁷ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.999 sample ≈ 10⁻⁷ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p0.9999 sample ≈ 10⁻⁵ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies:p1.00 sample ≈ 10⁻⁴ s/op
_09MillionsOfDummy_C1C2_JMH.createNDummies ss 0.007 s/op
```

## Times when ignoring the sum computed

```text
Benchmark Mode Cnt Score Error Units
_11Sum_C1C2_Challenge.sum thrpt 1472.511 ops/s
_11Sum_C1C2_Challenge.sum avgt 0.001 s/op
_11Sum_C1C2_Challenge.sum sample 14934 0.001 ± 0.001 s/op
_11Sum_C1C2_Challenge.sum:p0.00 sample 0.001 s/op
_11Sum_C1C2_Challenge.sum:p0.50 sample 0.001 s/op
_11Sum_C1C2_Challenge.sum:p0.90 sample 0.001 s/op
_11Sum_C1C2_Challenge.sum:p0.95 sample 0.001 s/op
_11Sum_C1C2_Challenge.sum:p0.99 sample 0.001 s/op
_11Sum_C1C2_Challenge.sum:p0.999 sample 0.002 s/op
_11Sum_C1C2_Challenge.sum:p0.9999 sample 0.003 s/op
_11Sum_C1C2_Challenge.sum:p1.00 sample 0.003 s/op
_11Sum_C1C2_Challenge.sum ss 0.005 s/op
```

## Times when considering the sum computed

```text
Benchmark Mode Cnt Score Error Units
_12Sum_C1C2_Solution.sum thrpt 791.332 ops/s
_12Sum_C1C2_Solution.sum avgt 0.001 s/op
_12Sum_C1C2_Solution.sum sample 8054 0.001 ± 0.001 s/op
_12Sum_C1C2_Solution.sum:p0.00 sample 0.001 s/op
_12Sum_C1C2_Solution.sum:p0.50 sample 0.001 s/op
_12Sum_C1C2_Solution.sum:p0.90 sample 0.002 s/op
_12Sum_C1C2_Solution.sum:p0.95 sample 0.002 s/op
_12Sum_C1C2_Solution.sum:p0.99 sample 0.002 s/op
_12Sum_C1C2_Solution.sum:p0.999 sample 0.003 s/op
_12Sum_C1C2_Solution.sum:p0.9999 sample 0.004 s/op
_12Sum_C1C2_Solution.sum:p1.00 sample 0.004 s/op
_12Sum_C1C2_Solution.sum ss 0.006 s/op
```