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Optimize string concatenation for better performance #19

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Optimize string concatenation for better performance #19

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12 changes: 9 additions & 3 deletions Serilog.Enrichers.CallStack/CallStackEnricher.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;

namespace Serilog.Enrichers.CallStack;

Expand Down Expand Up @@ -350,18 +351,23 @@ private string BuildCallStackString(StackFrame[] frames)
relevantFrames = relevantFrames.Take(_configuration.MaxFrames).ToArray();
}

var callStackParts = new List<string>();
// Performance optimization: Use StringBuilder to reduce string allocations
var sb = new StringBuilder();
var isFirst = true;

foreach (var frame in relevantFrames)
{
var frameString = FormatStackFrame(frame);
if (!string.IsNullOrEmpty(frameString))
{
callStackParts.Add(frameString);
if (!isFirst)
sb.Append(" --> ");
sb.Append(frameString);
isFirst = false;
}
}

return callStackParts.Count > 0 ? string.Join(" --> ", callStackParts) : string.Empty;
return sb.Length > 0 ? sb.ToString() : string.Empty;
}

/// <summary>
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