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Simplify internal async callback code #2091

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merged 4 commits into from Aug 9, 2023

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Wraith2
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@Wraith2 Wraith2 commented Jul 20, 2023

In previous PR's I optimized async paths to use state objects and cached delegates to static functions to avoid instance delegate invocations. The c# compiler now implements delegate caching directly for static lambdas and produces easier to read code. This PR converts the existing manual delegate caching to the compiler provided method.

It converts ExecuteXmlReaderAsync to use the cached context object pattern.
It converts ExecuteNonQueryAsync to use a cached context object, it was already using a context object so this just adds caching.

I suggest reviewing each commit individually. Side by side diffs make the changes look more confusing than they really are. Netcore only because when sqlcommand is merged I expect the netcore versions to be used since they're generally better for perf.

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codecov bot commented Jul 20, 2023

Codecov Report

Patch coverage: 98.75% and project coverage change: +0.01 🎉

Comparison is base (3607fe2) 70.67% compared to head (2e1fd2a) 70.69%.

Additional details and impacted files
@@            Coverage Diff             @@
##             main    #2091      +/-   ##
==========================================
+ Coverage   70.67%   70.69%   +0.01%     
==========================================
  Files         306      306              
  Lines       61995    62071      +76     
==========================================
+ Hits        43816    43878      +62     
- Misses      18179    18193      +14     
Flag Coverage Δ
addons 92.88% <ø> (ø)
netcore 73.43% <98.75%> (+0.02%) ⬆️
netfx 69.33% <ø> (-0.01%) ⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files Coverage Δ
.../Microsoft/Data/SqlClient/SqlInternalConnection.cs 72.77% <ø> (ø)
...netcore/src/Microsoft/Data/SqlClient/SqlCommand.cs 84.07% <98.75%> (+0.39%) ⬆️

... and 7 files with indirect coverage changes

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@cheenamalhotra cheenamalhotra left a comment

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I will take a closer look sometime soon, but just sharing a few thoughts I had when I started looking into it.

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@David-Engel David-Engel left a comment

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This definitely improves code readability. Thanks for the submission!

SqlClient v5.2 automation moved this from In progress to Reviewer approved Aug 9, 2023
@David-Engel David-Engel merged commit 930133e into dotnet:main Aug 9, 2023
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SqlClient v5.2 automation moved this from Reviewer approved to Done Aug 9, 2023
@Wraith2 Wraith2 deleted the perf-asynccontextnonquery2 branch August 13, 2023 13:39
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4 participants