Ensure we only ask for a symbol's documentation comment once #68452
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jasonmalinowski merged 6 commits intodotnet:mainfrom Jun 7, 2023
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This also removes the IStructuralTypeDisplayService we were passing around when we already had (or coud have) language services available.
Right now computing hover information is a fairly expensive portion of an LSIF dump. One small hotspot was we were fetching documentation comment information at least twice: once for the documentation itself and once for computing the exception info. This ensures we fetch it just once per generation. This also generally cleans up the AbstractSymbolDescriptionBuilder: 1. Duplicate local functions for returns/value is unified. 2. Removes a bunch of specific logic in the builder which supported finding the correct documentation in favor of the helper we already had. To support the second one, I added some methods to DocumentationComment to return a DocumentationComment with the contents of a <param> tag as the summary text for a specific parameter; this allows everything else to be able to operate as if that's a regular summary tag and removes some special cases in the code.
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jasonmalinowski
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Jun 6, 2023
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VS 17.6 fixed the issues around .dic files having to be UTF-16 encoded, so we can just do this now.
jasonmalinowski
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Jun 6, 2023
| private void AddDocumentationContent(ISymbol symbol) | ||
| private void AddDocumentationContent(ISymbol symbol, DocumentationComment documentationComment) | ||
| { | ||
| var formatter = Services.GetRequiredLanguageService<IDocumentationCommentFormattingService>(_semanticModel.Language); |
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This logic was duplicated in ISymbolExtensions_2.cs, so it's unified now.
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jasonmalinowski
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Jun 7, 2023
| internal abstract partial class AbstractSymbolDisplayService : ISymbolDisplayService | ||
| { | ||
| protected readonly LanguageServices Services; | ||
| protected readonly IStructuralTypeDisplayService AnonymousTypeDisplayService; |
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For some reason we were passing around both LanguageServices and also one instance of a specific language service, so cleaned up.
jasonmalinowski
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Jun 7, 2023
| return text; | ||
| } | ||
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| public DocumentationComment? GetParameter(string parameterName) |
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I should add some better doc comments here -- but to simplify handling in the other parts of the code, the idea here is if we have a member, we can create a new DocumentationComment object that has a <summary> tag with the same contents, so everything else can treat that identically.
CyrusNajmabadi
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Jun 7, 2023
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Right now computing hover information is a fairly expensive portion of an LSIF dump. One small hotspot was we were fetching documentation comment information at least twice: once for the documentation itself and once for computing the exception info. This ensures we fetch it just once per generation.
This also generally cleans up the AbstractSymbolDescriptionBuilder:
To support the second one, I added some methods to DocumentationComment to return a DocumentationComment with the contents of a tag as the summary text for a specific parameter; this allows everything else to be able to operate as if that's a regular summary tag and removes some special cases in the code.
This by itself isn't the hugest speedup (maybe a couple of percent) but generally makes the code easier to follow and easier to see where the remaining expensive bits are in traces.