Perf improvement: json

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
json [Fixed]	Json HttpSys 6- Trends Intel Win	07/25/2025 02:37:04	477,473	495,729	3.82 % (18,256) 👍	2.82 σ	6,471.15	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 10.0.0-preview.7.25372.103 -> 10.0.0-preview.7.25373.104 dotnet/dotnet@96ac952...c0e325f Microsoft.AspNetCore.App 10.0.0-preview.7.25372.103 -> 10.0.0-preview.7.25373.104 96ac952...c0e325f Microsoft.NETCore.App 10.0.0-preview.7.25372.103 -> 10.0.0-preview.7.25373.104 dotnet/runtime@96ac952...c0e325f

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