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Use ReadOnlyMemory<byte> for binary data to eliminate UTF-16 transcoding (#1070)

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
Co-authored-by: ericstj <8918108+ericstj@users.noreply.github.com>
Co-authored-by: Eric StJohn <ericstj@microsoft.com>
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Copilot 2026-02-19 14:08:05 -08:00 • committed by GitHub
commit 80b1ad21d7
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1 changed files with 400 additions and 103 deletions
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9
src/ModelContextProtocol.Core/Protocol/ResourceContents.cs
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@ -1,3 +1,4 @@
using System.Buffers;
using System.ComponentModel;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
@ -78,7 +79,7 @@ public abstract class ResourceContents
string? uri = null;
string? mimeType = null;
string? blob = null;
ReadOnlyMemory<byte>? blob = null;
string? text = null;
JsonObject? meta = null;
@ -104,7 +105,7 @@ public abstract class ResourceContents
break;
case "blob":
blob = reader.GetString();
blob = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan.ToArray();
break;
case "text":
@ -127,7 +128,7 @@ public abstract class ResourceContents
{
Uri = uri ?? string.Empty,
MimeType = mimeType,
Blob = blob,
Blob = blob.Value,
Meta = meta,
};
}
@ -162,7 +163,7 @@ public abstract class ResourceContents
Debug.Assert(value is BlobResourceContents or TextResourceContents);
if (value is BlobResourceContents blobResource)
{
writer.WriteString("blob", blobResource.Blob);
writer.WriteString("blob", blobResource.Blob.Span);
}
else if (value is TextResourceContents textResource)
{