dotnet / dotnet/aspnetcore

Perf regression: fortunes, fortunes_ef, json_middleware

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area-perf perf-regression
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Description

| Scenario | Environment | Date | Old RPS | New RPS | Change | Deviation | StDev | Dependencies |
| -------- | ----------- | ---- | ------- | ------- | ------ | --------- | ----- | ------------ |
| fortunes | Fortunes Platform 20- Trends Database 28 Core Cobalt Hosted Lin Server | 12/08/2025 00:25:36 | 230,252 | 165,242 | -28.23 % (-65,011) :thumbsdown: | -14.77 σ | 4,402.77 | Changes NameVersionDiff |
| fortunes_ef [Fixed] | Fortunes Platform EF 19- Trends Database Cobalt Hosted Lin Server | 12/08/2025 00:08:19 | 216,148 | 147,620 | -31.70 % (-68,528) :thumbsdown: | -18.30 σ | 3,744.17 | Changes NameVersionDiff |
| json_middleware | Json 400k 14- Trends 28 Core Cobalt Hosted Lin Server | 12/07/2025 22:03:11 | 23,144 | 17,233 | -25.54 % (-5,911) :thumbsdown: | -20.40 σ | 289.72 | Changes NameVersionDiff |

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@sebastienros

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