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‎README.md

Lines changed: 73 additions & 126 deletions
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@@ -15,8 +15,54 @@ The version of StringBuilder built on an array of strings string[]: uses less me
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## Benchmark:
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<details>
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<summary>ToString</summary>
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```C#
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[IterationSetup]
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public void Setup()
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{
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_str = new string('S', StrLength);
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_sb = new System.Text.StringBuilder();
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for (int i = 0; i < 1000; i++)
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{
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_sb.AppendLine(_str);
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}
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_sbArr = new StringBuilderArray.StringBuilderArray();
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for (int i = 0; i < 1000; i++)
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{
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_sbArr.AppendLine(_str);
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}
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}
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[Benchmark(Baseline = true, Description = "StringBuilder")]
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public void StringBuilder()
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{
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_sb.ToString();
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}
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[Benchmark(Description = "StringBuilderArray")]
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public void StringBuilderArray()
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{
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_sbArr.ToString();
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}
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```
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</details>
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<br>
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<details>
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<summary>AppendLine</summary>
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```C#
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[IterationSetup]
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public void Setup()
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{
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_str = new string('S', StrLength);
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}
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[Benchmark(Baseline = true, Description = "StringBuilder")]
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public void StringBuilder()
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{
@@ -25,8 +71,6 @@ The version of StringBuilder built on an array of strings string[]: uses less me
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{
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sb.AppendLine(_str);
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}
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var result = sb.ToString();
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}
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[Benchmark(Description = "StringBuilderArray")]
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{
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sb.AppendLine(_str);
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}
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var result = sb.ToString();
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}
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```
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| Method | StrLength | Mean | Ratio | Allocated | Alloc Ratio |
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|------------------- |---------- |--------------:|------:|--------------:|------------:|
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| **StringBuilder** | **5** | **17.89 μs** | **1.00** | **30.98 KB** | **1.00** |
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| StringBuilderArray | 5 | 33.04 μs | 1.84 | 34.77 KB | 1.12 |
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| | | | | | |
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| **StringBuilder** | **7** | **19.36 μs** | **1.00** | **50.59 KB** | **1.00** |
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| StringBuilderArray | 7 | 33.03 μs | 1.71 | 38.67 KB | 0.76 |
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| | | | | | |
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| **StringBuilder** | **10** | **19.20 μs** | **1.00** | **56.45 KB** | **1.00** |
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| StringBuilderArray | 10 | 33.44 μs | 1.75 | 44.53 KB | 0.79 |
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| | | | | | |
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| **StringBuilder** | **50** | **27.21 μs** | **1.00** | **206.36 KB** | **1.00** |
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| StringBuilderArray | 50 | 35.86 μs | 1.25 | 122.66 KB | 0.59 |
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| | | | | | |
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| **StringBuilder** | **100** | **29.57 μs** | **1.00** | **413.8 KB** | **1.00** |
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| StringBuilderArray | 100 | 39.34 μs | 1.33 | 220.31 KB | 0.53 |
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| | | | | | |
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| **StringBuilder** | **1000** | **701.28 μs** | **1.00** | **3935.53 KB** | **1.00** |
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| StringBuilderArray | 1000 | 587.01 μs | 0.89 | 1978.13 KB | 0.50 |
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| | | | | | |
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| **StringBuilder** | **2500** | **1,840.94 μs** | **1.00** | **9804.08 KB** | **1.00** |
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| StringBuilderArray | 2500 | 1,374.07 μs | 0.75 | 4907.81 KB | 0.50 |
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| | | | | | |
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| **StringBuilder** | **5000** | **5,041.05 μs** | **1.00** | **19583.76 KB** | **1.00** |
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| StringBuilderArray | 5000 | 2,795.59 μs | 0.56 | 9790.95 KB | 0.50 |
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| | | | | | |
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| **StringBuilder** | **10000** | **9,842.60 μs** | **1.00** | **39162.77 KB** | **1.00** |
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| StringBuilderArray | 10000 | 5,271.43 μs | 0.53 | 19556.25 KB | 0.50 |
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| | | | | | |
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| **StringBuilder** | **100000** | **54,744.65 μs** | **1.00** | **390802.46 KB** | **1.00** |
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| StringBuilderArray | 100000 | 20,572.29 μs | 0.38 | 195337.5 KB | 0.50 |
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| | | | | | |
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| **StringBuilder** | **500000** | **213,324.82 μs** | **1.00** | **1953310.77 KB** | **1.00** |
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| StringBuilderArray | 500000 | 105,173.60 μs | 0.49 | 976587.5 KB | 0.50 |
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| | | | | | |
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| **StringBuilder** | **1071741** | **289,821.51 μs** | **1.00** | **4186664.2 KB** | **1.00** |
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| StringBuilderArray | 1071741 | 153,198.15 μs | 0.53 | 2093269.14 KB | 0.50 |
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## Reuse instance benchmark
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</details>
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<br>
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<details>
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<summary>AppendLine + Clear</summary>
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```C#
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[IterationSetup]
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public void Setup()
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{
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_str = new string('S', StrLength);
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}
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[Benchmark(Baseline = true, Description = "StringBuilder")]
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public void StringBuilder()
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{
@@ -98,8 +111,6 @@ The version of StringBuilder built on an array of strings string[]: uses less me
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{
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sb.AppendLine(_str);
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}
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var result = sb.ToString();
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}
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[Benchmark(Description = "StringBuilderArray")]
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{
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sb.AppendLine(_str);
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}
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var result = sb.ToString();
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}
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```
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| Method | StrLength | Mean | Ratio | Allocated | Alloc Ratio |
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|------------------- |---------- |--------------:|------:|--------------:|------------:|
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| **StringBuilder** | **5** | **25.98 μs** | **1.00** | **47.01 KB** | **1.00** |
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| StringBuilderArray | 5 | 39.27 μs | 1.54 | 55.1 KB | 1.17 |
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| | | | | | |
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| **StringBuilder** | **7** | **23.70 μs** | **1.00** | **71.7 KB** | **1.00** |
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| StringBuilderArray | 7 | 40.51 μs | 1.72 | 59.01 KB | 0.82 |
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| | | | | | |
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| **StringBuilder** | **10** | **25.20 μs** | **1.00** | **84.59 KB** | **1.00** |
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| StringBuilderArray | 10 | 39.08 μs | 1.60 | 64.87 KB | 0.77 |
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| | | | | | |
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| **StringBuilder** | **50** | **30.39 μs** | **1.00** | **309.51 KB** | **1.00** |
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| StringBuilderArray | 50 | 45.60 μs | 1.52 | 142.99 KB | 0.46 |
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| | | | | | |
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| **StringBuilder** | **100** | **108.48 μs** | **1.00** | **626.33 KB** | **1.00** |
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| StringBuilderArray | 100 | 44.93 μs | 0.45 | 240.65 KB | 0.38 |
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| | | | | | |
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| **StringBuilder** | **1000** | **1,179.51 μs** | **1.00** | **5904.3 KB** | **1.00** |
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| StringBuilderArray | 1000 | 570.91 μs | 0.49 | 1998.46 KB | 0.34 |
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| | | | | | |
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| **StringBuilder** | **2500** | **3,970.17 μs** | **1.00** | **14698.94 KB** | **1.00** |
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| StringBuilderArray | 2500 | 1,516.39 μs | 0.38 | 4928.15 KB | 0.34 |
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| | | | | | |
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| **StringBuilder** | **5000** | **8,286.17 μs** | **1.00** | **29353.62 KB** | **1.00** |
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| StringBuilderArray | 5000 | 2,903.21 μs | 0.35 | 9810.96 KB | 0.33 |
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| | | | | | |
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| **StringBuilder** | **10000** | **13,094.03 μs** | **1.00** | **58702.15 KB** | **1.00** |
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| StringBuilderArray | 10000 | 5,196.08 μs | 0.40 | 19576.59 KB | 0.33 |
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| | | | | | |
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| **StringBuilder** | **100000** | **66,915.82 μs** | **1.00** | **586134.84 KB** | **1.00** |
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| StringBuilderArray | 100000 | 20,600.99 μs | 0.31 | 195357.84 KB | 0.33 |
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| | | | | | |
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| **StringBuilder** | **500000** | **284,550.02 μs** | **1.00** | **2930037.34 KB** | **1.00** |
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| StringBuilderArray | 500000 | 105,025.78 μs | 0.37 | 976607.84 KB | 0.33 |
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| | | | | | |
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| **StringBuilder** | **1071741** | **370,070.86 μs** | **1.00** | **6280013.72 KB** | **1.00** |
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| StringBuilderArray | 1071741 | 153,051.83 μs | 0.41 | 2093289.48 KB | 0.33 |
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Insert benchmark
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</details>
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<br>
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<details>
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<summary>Insert</summary>
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```C#
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[IterationSetup]
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public void Setup()
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{
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_str = new string('S', StrLength);
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}
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[Benchmark(Baseline = true, Description = "StringBuilder")]
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public void StringBuilder()
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{
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//before 1 str from end
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sb.Insert(99 * _str.Length, _str);
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//in start
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sb.Insert(0, _str);
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//after 5 str from start
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sb.Insert(5 * _str.Length, _str);
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}
@@ -191,47 +172,13 @@ Insert benchmark
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}
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sb.Insert(0, _str);
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//in start
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sb.Insert(100, _str);
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//after 5 str from start
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sb.Insert(96, _str);
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}
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```
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| Method | StrLength | Mean | Ratio | Allocated | Alloc Ratio |
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|------------------- |---------- |--------------:|------:|-------------:|------------:|
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| **StringBuilder** | **5** | **2.064 μs** | **1.00** | **2.31 KB** | **1.00** |
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| StringBuilderArray | 5 | 3.800 μs | 1.79 | 2.04 KB | 0.88 |
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| | | | | | |
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| **StringBuilder** | **7** | **2.075 μs** | **1.00** | **3.38 KB** | **1.00** |
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| StringBuilderArray | 7 | 3.878 μs | 1.88 | 2.04 KB | 0.60 |
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| | | | | | |
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| **StringBuilder** | **10** | **2.071 μs** | **1.00** | **3.38 KB** | **1.00** |
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| StringBuilderArray | 10 | 3.872 μs | 1.90 | 2.04 KB | 0.60 |
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| | | | | | |
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| **StringBuilder** | **50** | **2.738 μs** | **1.00** | **14.24 KB** | **1.00** |
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| StringBuilderArray | 50 | 3.935 μs | 1.47 | 2.04 KB | 0.14 |
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| | | | | | |
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| **StringBuilder** | **100** | **3.129 μs** | **1.00** | **27.02 KB** | **1.00** |
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| StringBuilderArray | 100 | 3.930 μs | 1.26 | 2.04 KB | 0.08 |
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| | | | | | |
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| **StringBuilder** | **1000** | **10.129 μs** | **1.00** | **210.98 KB** | **1.000** |
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| StringBuilderArray | 1000 | 3.872 μs | 0.41 | 2.04 KB | 0.010 |
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| | | | | | |
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| **StringBuilder** | **2500** | **21.183 μs** | **1.00** | **506.12 KB** | **1.000** |
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| StringBuilderArray | 2500 | 3.920 μs | 0.19 | 2.04 KB | 0.004 |
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| | | | | | |
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| **StringBuilder** | **5000** | **40.544 μs** | **1.00** | **1022.95 KB** | **1.000** |
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| StringBuilderArray | 5000 | 3.840 μs | 0.10 | 2.04 KB | 0.002 |
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| | | | | | |
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| **StringBuilder** | **10000** | **71.205 μs** | **1.00** | **2019.62 KB** | **1.000** |
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| StringBuilderArray | 10000 | 3.931 μs | 0.06 | 2.04 KB | 0.001 |
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| | | | | | |
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| **StringBuilder** | **100000** | **5,484.256 μs** | **1.000** | **20133.58 KB** | **1.000** |
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| StringBuilderArray | 100000 | 3.898 μs | 0.001 | 2.04 KB | 0.000 |
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| | | | | | |
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| **StringBuilder** | **500000** | **13,426.100 μs** | **1.000** | **100610.3 KB** | **1.000** |
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| StringBuilderArray | 500000 | 4.041 μs | 0.000 | 2.04 KB | 0.000 |
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| | | | | | |
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| **StringBuilder** | **1071741** | **15,779.680 μs** | **1.000** | **215621.21 KB** | **1.000** |
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| StringBuilderArray | 1071741 | 4.087 μs | 0.000 | 2.04 KB | 0.000 |
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</details>

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