Perf regression: kestrel-header-symbols

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
kestrel-header-symbols	Kestrel Linux: Invalid Header 14- Trends cobalt-hosted-lin-28	07/06/2026 10:34:04	5,969	5,122	-100.00 % (-847) 👎	-2.47 σ	343.05	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 11.0.0-preview.7.26354.101 -> 11.0.0-preview.7.26355.102 dotnet/dotnet@02385e2...b4b350a Microsoft.AspNetCore.App 11.0.0-preview.7.26354.101 -> 11.0.0-preview.7.26355.102 dotnet/dotnet@02385e2...b4b350a Microsoft.NETCore.App 11.0.0-preview.7.26354.101 -> 11.0.0-preview.7.26355.102 dotnet/dotnet@02385e2...b4b350a

PowerBI Dashboard

@sebastienros

[vokusocogu61]

kestrel_fix.zip
Man, that Kestrel header error was driving me nuts. Turns out the preview build had a total meltdown with the Antiforgery dll on cobalt hosts. I found a way to bypass that header mismatch by remapping the symbol offsets in the runtime.