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Code Issues

🐎 Improve performance for string.Reverse

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Item for #12
This commit is contained in:
Oliver Booth 2021-01-14 17:09:39 +00:00
parent 43e49d4826
commit 14f600666b
1 changed files with 21 additions and 1 deletions
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22
X10D/src/StringExtensions.cs
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@ -265,7 +265,27 @@
/// <returns>A <see cref="string" /> whose characters are that of <paramref name="value" /> in reverse order.</returns>
public static string Reverse(this string value)
{
return string.Join(string.Empty, Enumerable.Reverse(value));
if (value is null)
{
throw new ArgumentNullException(nameof(value));
}
if (value.Length == 1)
{
return value;
}
unsafe
{
var array = stackalloc char[value.Length];
for (var index = 0; index < value.Length; index++)
{
array[index] = value[value.Length - index - 1];
}
return new string(array);
}
}
/// <summary>