Perf regression: antiforgery-validation, https, json

| Scenario | Environment | Date | Old RPS | New RPS | Change | Deviation | StDev | Dependencies |
| -------- | ----------- | ---- | ------- | ------- | ------ | --------- | ----- | ------------ |
| antiforgery-validation [Fixed] | Antiforgery Token Validation 10- Trends idna-amd-lin | 08/03/2026 22:20:19 | 42,877 | 41,174 | -3.97 % (-1,703) :thumbsdown: | -6.02 σ | 282.81 | Changes NameVersionDiff Antiforgery.dll `1.0.0` -> `1.0.0` https://github.com/aspnet/Benchmarks/compare/25660cbc6197910908842da07c25c7cde8235ae3...09ea584cdf617e9dc64286db9805476bb7a98c6c |
| https | Json Https 11- Trends idna-intel-lin | 08/03/2026 22:46:13 | 93,556 | 85,755 | -8.34 % (-7,801) :thumbsdown: | -3.93 σ | 1,984.17 | Changes NameVersionDiff Benchmarks.dll `1.0.0` -> `1.0.0` https://github.com/aspnet/Benchmarks/compare/25660cbc6197910908842da07c25c7cde8235ae3...09ea584cdf617e9dc64286db9805476bb7a98c6c |
| json | Json Platform 10- Trends idna-amd-lin | 08/03/2026 21:59:35 | 179,825 | 163,626 | -9.01 % (-16,198) :thumbsdown: | -3.57 σ | 4,539.29 | Changes NameVersionDiff PlatformBenchmarks.dll `1.0.0` -> `1.0.0` https://github.com/aspnet/Benchmarks/compare/25660cbc6197910908842da07c25c7cde8235ae3...09ea584cdf617e9dc64286db9805476bb7a98c6c |

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

@sebastienros

Start with the antiforgery-validation, https, and json benchmark rows and review the linked Benchmarks comparison from commit 25660cbc6197910908842da07c25c7cde8235ae3 to 09ea584cdf617e9dc64286db9805476bb7a98c6c. Reproduce the reported runs using the PowerBI Dashboard or benchmark setup, then determine whether the regressions are repeatable and which change accounts for them.

Written by the indexing model from the issue text.