Perf regression: mvc

| Scenario | Environment | Date | Old RPS | New RPS | Change | Deviation | StDev | Dependencies |
| -------- | ----------- | ---- | ------- | ------- | ------ | --------- | ----- | ------------ |
| mvc | Json Mvc 13- Trends cobalt-hosted-lin-azl3 | 06/21/2026 09:15:15 | 666,603 | 310,814 | -53.37 % (-355,789) :thumbsdown: | -2.69 σ | 132,489.82 | Changes NameVersionDiff Microsoft.AspNetCore.Antiforgery.dll `11.0.0-preview.6.26318.109` -> `11.0.0-preview.6.26319.105` https://github.com/dotnet/dotnet/compare/2d748ca0a1e035e7b7c5bfb74e944b26a8df654b...b756a8d8a0e64905e16c81911bb09a8110bc3395 Microsoft.AspNetCore.App `11.0.0-preview.6.26318.109` -> `11.0.0-preview.6.26319.105` https://github.com/dotnet/dotnet/compare/2d748ca0a1e035e7b7c5bfb74e944b26a8df654b...b756a8d8a0e64905e16c81911bb09a8110bc3395 Microsoft.NETCore.App `11.0.0-preview.6.26318.109` -> `11.0.0-preview.6.26319.105` https://github.com/dotnet/dotnet/compare/2d748ca0a1e035e7b7c5bfb74e944b26a8df654b...b756a8d8a0e64905e16c81911bb09a8110bc3395 |

[PowerBI Dashboard](https://aka.ms/aspnet/benchmarks)

@sebastienros

Start with the mvc scenario in the benchmark table and compare the old and new runs, including the listed ASP.NET Core and .NET dependency changes. Use the linked PowerBI Dashboard and dependency comparison to investigate the regression. Done means identifying the responsible change and restoring or explaining the roughly 53% RPS loss.

Written by the indexing model from the issue text.