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Avoid char[] allocation in AltSvcHeaderParser #103764

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merged 1 commit into from
Jun 21, 2024
+4 −1
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Avoid char[] allocation in AltSvcHeaderParser #103764

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5 changes: 4 additions & 1 deletion src/libraries/System.Net.Http/src/System/Net/Http/Headers/AltSvcHeaderParser.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -265,7 +265,9 @@ private static bool TryReadUnknownPercentEncodedAlpnProtocolName(ReadOnlySpan<ch
return true;
}

var builder = new ValueStringBuilder(value.Length <= 128 ? stackalloc char[128] : new char[value.Length]);
var builder = value.Length <= 128 ?
new ValueStringBuilder(stackalloc char[128]) :
new ValueStringBuilder(value.Length);

do
{
Expand All @@ -276,6 +278,7 @@ private static bool TryReadUnknownPercentEncodedAlpnProtocolName(ReadOnlySpan<ch

if ((value.Length - idx) < 3 || !TryReadAlpnHexDigit(value[1], out int hi) || !TryReadAlpnHexDigit(value[2], out int lo))
{
builder.Dispose();
result = null;
return false;
}
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