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IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 144.952449845679 > 133.54047838618894.
IsChangePoint: Marked as a change because one of 12/21/2022 9:23:17 AM, 1/17/2023 8:36:05 PM, 1/24/2023 6:33:57 AM falls between 1/15/2023 4:08:29 PM and 1/24/2023 6:33:57 AM.
IsRegressionStdDev: Marked as regression because -35.687283578257905 (T) = (0 -147617.61720326805) / Math.Sqrt((5647909.848760539 / (30)) + (2989695.2155531375 / (38))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (38) - 2, .025) and -0.14273389516406024 = (129179.34597719695 - 147617.61720326805) / 129179.34597719695 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.
```### Baseline Jit Disasm
```assembly
; System.Text.Perf_Utf8Encoding.GetBytes()
mov rdx,rcx
mov rcx,[rdx+28]
mov rdx,[rdx+18]
mov rax,[rcx]
mov rax,[rax+58]
jmp qword ptr [rax+10]
; Total bytes of code 22
Compare Jit Disasm
; System.Text.Perf_Utf8Encoding.GetBytes()movrdx,rcxmovrcx,[rdx+28]movrdx,[rdx+18]movrax,[rcx]movrax,[rax+58]jmp qword ptr [rax+10]; Total bytes of code 22
@EgorBo in such case my only guess is code alignment (in dotnet/runtime#80709 I've added a new layer of abstraction which introduced regressions for small inputs and in dotnet/runtime#75012 I've removed it which solved these regressions)
Run Information
Regressions in System.Text.Perf_Utf8Encoding
Test Report
Repro
Payloads
Baseline
Compare
Histogram
System.Text.Perf_Utf8Encoding.GetBytes(Input: Chinese)
Description of detection logic
Compare Jit Disasm
Docs
Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository
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