Snippet

Memory-Safe String Slicing via ReadOnlySpan

Using ReadOnlySpan<char> allows for high-performance string manipulation by pointing directly to existing memory. This eliminates heap allocations during slicing, which is critical for low-latency systems and high-throughput data processing.

snippet.cs

csharp

public void ParsePayload(string data)
{
    // Avoids creating a new string object on the heap
    ReadOnlySpan<char> span = data.AsSpan();
    
    int start = data.IndexOf(':') + 1;
    ReadOnlySpan<char> segment = span.Slice(start, 5);
 
    if (segment.SequenceEqual("DEBUG"))
    {
        EnableVerboseLogging();
    }
}

Breakdown

data.AsSpan()

Creates a value-type view over the string without copying data.

span.Slice(start, 5)

Creates a sub-view of the original memory window.

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Memory-Safe String Slicing via ReadOnlySpan

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