Perf improvement: httpsys-hostheader-mismatch, json, json

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
httpsys-hostheader-mismatch	HttpSys Windows: Host Header Mismatch 6- Trends Gold Win	12/18/2025 12:54:02	12,035	12,466	3.58 % (431) 👍	6.84 σ	63.00	Changes Name Version Diff
json	Json Platform Inline 13- Trends Cobalt Hosted Lin Server	12/18/2025 21:00:00	326,767	953,970	191.94 % (627,203) 👍	5.77 σ	108,713.66	Changes Name Version Diff PlatformBenchmarks.dll 1.0.0 -> 1.0.0 aspnet/Benchmarks@5643540...bc8e7cf Npgsql.dll 9.0.3 -> 9.0.4 npgsql/npgsql@97dc173...3b6c74c
json	Json 13- Trends Cobalt Hosted Lin Server	12/18/2025 21:11:39	398,656	861,131	116.01 % (462,475) 👍	3.88 σ	119,170.48	Changes Name Version Diff xunit.assert.dll 2.4.2 -> 2.9.2 /compare/f110e5bee5...82543a6df6 SQLitePCLRaw.batteries_v2.dll 2.1.10 -> 2.1.11 n/a Microsoft.DotNet.RemoteExecutor.dll 9.0.0-beta.24516.2 -> 10.0.0-beta.25531.102 dotnet/arcade@3c393bb...ba86126 Microsoft.AspNetCore.InternalTesting.dll 9.0.0-rtm.24529.3 -> 10.0.0-rtm.25531.102 af22eff...ba86126 Benchmarks.dll 1.0.0 -> 1.0.0 aspnet/Benchmarks@5643540...bc8e7cf Npgsql.EntityFrameworkCore.PostgreSQL.dll 9.0.4 -> 10.0.0 npgsql/efcore.pg@fd23809...7624373 Npgsql.dll 9.0.3 -> 10.0.0 npgsql/npgsql@97dc173...a180218 Microsoft.AspNetCore.Antiforgery.dll 10.0.0-rtm.25513.102 (New ) n/a Microsoft.Extensions.Configuration.Binder.dll 10.0.0 (New ) n/a Microsoft.Data.Sqlite.dll 10.0.1 (New ) n/a Microsoft.AspNetCore.Antiforgery.dll 10.0.0-rtm.25513.102 (Removed) n/a Microsoft.Data.Sqlite.dll 9.0.0-rc.2.24474.1 (Removed) n/a Microsoft.Extensions.DependencyModel.dll 9.0.0-rc.2.24473.5 (Removed) n/a Microsoft.EntityFrameworkCore.Abstractions.dll 9.0.1 (Removed) n/a System.ServiceProcess.ServiceController.dll 9.0.0 (Removed) n/a

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