performance/src/benchmarks/micro/libraries/System.Memory/ReadOnlySpan.cs at e4ab65e4607a8022322f336ad6ede649ffc5c679 · dotnet/performance · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System.Collections.Generic;
using System.Linq;
using BenchmarkDotNet.Attributes;
using MicroBenchmarks;
using Consumer = BenchmarkDotNet.Engines.Consumer;

namespace System.Memory
{
    [BenchmarkCategory(Categories.Runtime, Categories.Libraries, Categories.Span)]
    public class ReadOnlySpan
    {
        private readonly string _sampeString = "this is a very nice sample string";

        [Benchmark]
        public ReadOnlySpan<char> StringAsSpan() => _sampeString.AsSpan();

        [Benchmark(OperationsPerInvoke = 16 * 2)]
        public char GetPinnableReference()
        {
            ReadOnlySpan<char> span = _sampeString.AsSpan();
            char c;

            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            c = span.GetPinnableReference(); c = span.GetPinnableReference();
            return c;
        }

        [Benchmark(OperationsPerInvoke = 16)]
        [ArgumentsSource(nameof(IndexOfStringArguments))]
        [MemoryRandomization]
        public int IndexOfString(string input, string value, StringComparison comparisonType)
        {
            ReadOnlySpan<char> inputSpan = input.AsSpan();
            ReadOnlySpan<char> valueSpan = value.AsSpan();

            int result = 0;

            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);
            result ^= inputSpan.IndexOf(valueSpan, comparisonType); result ^= inputSpan.IndexOf(valueSpan, comparisonType);

            return result;
        }

        public static IEnumerable<object[]> IndexOfStringArguments => new List<object[]>
        {
            new object[] { "string1", "string2", StringComparison.InvariantCulture },
            new object[] { "foobardzsdzs", "rddzs", StringComparison.InvariantCulture },
            new object[] { "StrIng", "string", StringComparison.OrdinalIgnoreCase },
            new object[] { "\u3060", "\u305F", StringComparison.InvariantCulture },
            new object[] { "ABCDE", "c", StringComparison.InvariantCultureIgnoreCase },
            new object[] { "More Test's", "Tests", StringComparison.OrdinalIgnoreCase },
            new object[] { "Hello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello Worldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylong!xyz", "~", StringComparison.Ordinal },
            new object[] { "Hello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello Worldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylong!xyz", "w", StringComparison.OrdinalIgnoreCase },
            new object[] { "Hello Worldbbbbbbbbbbbbbbcbbbbbbbbbbbbbbbbbbba!", "y", StringComparison.Ordinal },
            new object[] { GenerateInputString('A', 10, '5', 5), "5", StringComparison.InvariantCulture },
            new object[] { GenerateInputString('A', 100, 'X', 70), "x", StringComparison.InvariantCultureIgnoreCase },
            new object[] { GenerateInputString('A', 100, 'X', 70), "x", StringComparison.OrdinalIgnoreCase },
            new object[] { GenerateInputString('A', 1000, 'X', 500), "X", StringComparison.Ordinal },
            new object[] { GenerateInputString('\u3060', 1000, 'x', 500), "x", StringComparison.Ordinal },
            new object[] { GenerateInputString('\u3060', 100, '\u3059', 50), "\u3059", StringComparison.Ordinal }
        };

        [Benchmark]
        [ArgumentsSource(nameof(TrimArguments))]
        [MemoryRandomization]
        public ReadOnlySpan<char> Trim(string input) => input.AsSpan().Trim();

        public static IEnumerable<object> TrimArguments()
        {
            yield return "";
            yield return " abcdefg ";
            yield return "abcdefg";
        }

        [Benchmark]
        [ArgumentsSource(nameof(IsWhiteSpaceArguments))]
        [MemoryRandomization]
        public bool IsWhiteSpace(int _, string input) => input.AsSpan().IsWhiteSpace();

        public static IEnumerable<object[]> IsWhiteSpaceArguments()
        {
            const string WhiteSpaceChars = "\t\n\v\f\r\u0085\u00a0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000";

            yield return new object[] { 001, ""};
            yield return new object[] { 002, "0abcdefg" };
            yield return new object[] { 010, new string(' ', 01) + "1abcdefg" };
            yield return new object[] { 020, new string(' ', 01) + WhiteSpaceChars.Substring(0, 01) + "2abcdefg" };
            yield return new object[] { 040, new string(' ', 02) + WhiteSpaceChars.Substring(0, 02) + "4abcdefg" };
            yield return new object[] { 060, new string(' ', 03) + WhiteSpaceChars.Substring(0, 03) + "6abcdefg" };
            yield return new object[] { 070, new string(' ', 04) + WhiteSpaceChars.Substring(0, 03) + "7abcdefg" };
            yield return new object[] { 080, new string(' ', 04) + WhiteSpaceChars.Substring(0, 04) + "8abcdefg" };
            yield return new object[] { 090, new string(' ', 05) + WhiteSpaceChars.Substring(0, 04) + "9abcdefg" };
            yield return new object[] { 160, new string(' ', 08) + WhiteSpaceChars.Substring(0, 08) + "16abcdefg" };
            yield return new object[] { 320, new string(' ', 16) + WhiteSpaceChars.Substring(0, 16) + "32abcdefg" };
        }

        private static string GenerateInputString(char source, int count, char replaceChar, int replacePos)
        {
            char[] str = new char[count];
            for (int i = 0; i < count; i++)
            {
                str[i] = source;
            }
            str[replacePos] = replaceChar;

            return new string(str);
        }
    }
}