Perf regression: json_middleware, json_middleware, json_middleware

[pr-benchmarks[bot]]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
json_middleware	Json 5M 1- Trends Intel Windows	09/25/2024 21:30:12	924	598	-35.33 % (-327) :thumbsdown:	-253.51 σ	1.29	Changes Name Version Diff Microsoft.AspNetCore.App 9.0.0-rtm.24466.12 -> 9.0.0-rtm.24474.6 https://github.com/dotnet/aspnetcore/compare/0d72ad5e4c5b1394e9708f47ed81e9748e4fd819...afe2857bffef08213d6f3c7688647c60d5d5e7bd Microsoft.NETCore.App 9.0.0-rc.2.24463.7 -> 9.0.0-rtm.24473.2 https://github.com/dotnet/runtime/compare/46cfb747b4c22471242dee0d106f5c79cf9fd4c5...3d9da91a9720f7bda3e4cef127b8195441fb2580
json_middleware	Json 400k 1- Trends Intel Windows	09/25/2024 21:31:04	11,808	11,004	-6.81 % (-805) :thumbsdown:	-98.37 σ	8.18	Changes Name Version Diff Microsoft.AspNetCore.App 9.0.0-rtm.24466.12 -> 9.0.0-rtm.24474.6 https://github.com/dotnet/aspnetcore/compare/0d72ad5e4c5b1394e9708f47ed81e9748e4fd819...afe2857bffef08213d6f3c7688647c60d5d5e7bd Microsoft.NETCore.App 9.0.0-rc.2.24463.7 -> 9.0.0-rtm.24473.2 https://github.com/dotnet/runtime/compare/46cfb747b4c22471242dee0d106f5c79cf9fd4c5...3d9da91a9720f7bda3e4cef127b8195441fb2580
json_middleware	Json 5M 2- Trends Intel Linux	09/25/2024 21:51:30	930	677	-27.19 % (-253) :thumbsdown:	-393.46 σ	0.64	Changes Name Version Diff Microsoft.AspNetCore.App 9.0.0-rtm.24466.12 -> 9.0.0-rtm.24474.6 https://github.com/dotnet/aspnetcore/compare/0d72ad5e4c5b1394e9708f47ed81e9748e4fd819...afe2857bffef08213d6f3c7688647c60d5d5e7bd Microsoft.NETCore.App 9.0.0-rc.2.24463.7 -> 9.0.0-rtm.24473.2 https://github.com/dotnet/runtime/compare/46cfb747b4c22471242dee0d106f5c79cf9fd4c5...3d9da91a9720f7bda3e4cef127b8195441fb2580

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@sebastienros

[sebastienros]

@BrennanConroy Legit. Currently isolating the commits, pinging you because it affects the improvements you got with PipeWriter changes.

[BrennanConroy]

Expected.