42acfe43ad
This change significantly reduces the amount of string and List<ISymbol> allocations that occur during compilation by changing the way LiteralChunks are combined. This is a low impact fix that addresses the performance issue, the design issues that caused it still exist. The problem here lies in what Razor fundamentally does - it parses HTML/C# into tokens, and then combines them back into 'chunks' a representation friendly to code generation. When presenting with a large block of static HTML, Razor parses it into individual HTML tokens, and then tries to join them in back into a single chunk for rendering. Due to details of Razor's representation of chunks/tokens, the process of combining literals is too expensive. Mainly, what's done here is to not try to combine instances of LiteralChunk. The process of merging them is too expensive and requires lots of interm List<ISymbol> and string allocations. Instead we produce a new 'chunk' ParentLiteralChunk, which doesn't do so much up-front computing. Various pieces of the code that deal with LiteralChunk need to be updated to deal with ParentLiteralChunk also, which is the bulk of the changes here. Note that we still have the potential for LOH allocations to occur during codegen, but it's likely to occur O(1) for each large block of HTML instead of O(N) as it did in the old code. |
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| tools | ||
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| CONTRIBUTING.md | ||
| LICENSE.txt | ||
| NuGet.config | ||
| NuGetPackageVerifier.json | ||
| README.md | ||
| Razor.sln | ||
| appveyor.yml | ||
| build.cmd | ||
| build.sh | ||
| global.json | ||
| makefile.shade | ||
README.md
Razor
AppVeyor:
Travis: 
The Razor syntax provides a fast, terse, clean and lightweight way to combine server code with HTML to create dynamic web content. This repo contains the parser and the C# code generator for the Razor syntax.
This project is part of ASP.NET 5. You can find samples, documentation and getting started instructions for ASP.NET 5 at the Home repo.