[Perf -19%] [Mono] System.Text.Tests.Perf_Encoding.GetByteCount

[DrewScoggins]

Run Information

Architecture	x64
OS	ubuntu 18.04
Changes	diff

Regressions in System.Text.Tests.Perf_Encoding

Benchmark	Baseline	Test	Test/Base	Modality	Baseline Outlier	Baseline ETL	Comapre ETL
GetByteCount	132.16 ns	156.75 ns	1.19		False

Historical Data in Reporting System

Histogram

System.Text.Tests.Perf_Encoding.GetByteCount(size: 512, encName: "utf-8")

[-127.596 ;  405.832) | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
[ 405.832 ;  925.098) | 
[ 925.098 ; 1444.364) | 
[1444.364 ; 1963.630) | 
[1963.630 ; 2188.876) | 
[2188.876 ; 2708.142) | @@@@@@@@@@@@@@@@
[2708.142 ; 3145.833) | @@
[3145.833 ; 3651.283) | 
[3651.283 ; 4174.273) | @@

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

[Dotnet-GitSync-Bot]

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[naricc]

This appears to have been caused by one of the commits in this range: f2d51b5...d6887d4

Tagging subscribers to this area: @tarekgh, @krwq
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[danmoseley]

@DrewScoggins the graph above does not show a regression (I do see it when I go to the link)

@naricc I think it's a bit narrower? f2d51b5...30e643e

Most likely commit is probably
30e643e
Jit: Remove bounds checks with tests against length. (#40180)

@dotnet/jit-contrib