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Perf: Stop creating parameter prefixed names #1829

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merged 1 commit into from Apr 10, 2023

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Wraith2
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@Wraith2 Wraith2 commented Nov 6, 2022

A fairly straight forward set of changes to avoid creating @ prefixed parameter names unless we need the string, for example in an error message. Most of the time we can either do a comparison that takes into account the prefixed and unprefixed possibilities or we can append the @ and then the parameter name if we just check what we already have.

Note that this does not change the parameter name that the user provides and will have no visible change as far as users are concerned. We're just being a little more careful about generating gen0 strings that are going to be thrown away.

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codecov bot commented Nov 6, 2022

Codecov Report

Base: 71.41% // Head: 71.39% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (7ae039b) compared to base (146c34e).
Patch coverage: 92.72% of modified lines in pull request are covered.

Additional details and impacted files
@@            Coverage Diff             @@
##             main    #1829      +/-   ##
==========================================
- Coverage   71.41%   71.39%   -0.02%     
==========================================
  Files         290      291       +1     
  Lines       61280    61362      +82     
==========================================
+ Hits        43761    43811      +50     
- Misses      17519    17551      +32     
Flag Coverage Δ
addons 92.38% <ø> (ø)
netcore 74.93% <92.42%> (-0.07%) ⬇️
netfx 69.38% <92.53%> (+0.06%) ⬆️

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

Impacted Files Coverage Δ
...netcore/src/Microsoft/Data/SqlClient/SqlCommand.cs 83.50% <90.00%> (+0.07%) ⬆️
...t/netfx/src/Microsoft/Data/SqlClient/SqlCommand.cs 73.59% <90.32%> (+0.43%) ⬆️
...lient/src/Microsoft/Data/SqlClient/SqlParameter.cs 75.70% <90.47%> (+0.30%) ⬆️
.../netcore/src/Microsoft/Data/SqlClient/TdsParser.cs 73.41% <100.00%> (+0.04%) ⬆️
...nt/netfx/src/Microsoft/Data/SqlClient/TdsParser.cs 70.95% <100.00%> (-0.10%) ⬇️
.../Microsoft/Data/SqlClient/SqlQueryMetadataCache.cs 62.06% <100.00%> (ø)
...core/src/Microsoft/Data/SqlClient/SNI/SNIHandle.cs 21.42% <0.00%> (-20.68%) ⬇️
...re/src/Microsoft/Data/SqlClient/SNI/SNINpHandle.cs 68.85% <0.00%> (-9.84%) ⬇️
...icrosoft/Data/SqlClient/LocalAppContextSwitches.cs 56.25% <0.00%> (-8.75%) ⬇️
.../src/Microsoft/Data/SqlClient/SNI/SNIMarsHandle.cs 87.89% <0.00%> (-4.49%) ⬇️
... and 13 more

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@@ -5995,11 +5999,11 @@ private SqlParameter BuildStoredProcedureStatementForColumnEncryption(string sto

// Find the return value parameter (if any).
SqlParameter returnValueParameter = null;
foreach (SqlParameter parameter in parameters)
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Why not keep the full name?

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Because a variable with that name is created and used later in this scope. I don't want to explicitly re-use the same variable because it can leave opportunity for errors to creep in with casual refactorings in future. So I renamed the foreach version because it has the lower number of uses. Same with the other one you noted below.

{
returnValueParameter = parameter;
returnValueParameter = param;
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Why not keep the full name?

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Wraith2 commented Apr 9, 2023

This is green and approved. Can I get it merged before other change start causing conflicts please?

@JRahnama JRahnama added this to the 5.2.0-preview1 milestone Apr 10, 2023
@JRahnama JRahnama merged commit 4702420 into dotnet:main Apr 10, 2023
kant2002 pushed a commit to kant2002/SqlClient that referenced this pull request Jun 29, 2023
@Wraith2 Wraith2 deleted the perf-paramnameappend branch March 17, 2024 23:26
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4 participants