dotnet/roslyn

Class with over 11,000 methods takes a *looong* time to build

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#18,631 opened on Apr 12, 2017

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 (26 comments) (5 reactions) (0 assignees)C# (20,414 stars) (4,257 forks)batch import
Area-CompilersBugTenet-Performancehelp wanted

Description

Version Used: 1.0.1

(Linux Ubuntu 16.04, Core i7 Skylake, 16GB)

I know this is not a "normal" kind of scenario by any means, but for good reasons I have a class with over eleven thousand methods and it takes quite some time to build, and totally kills VS Code.

I'm sure you have bigger fish to fry than caring about these kinds of fringe perf issues, but just letting you know in case you wanted to add a test like this to your test suite.

Best wishes

Contributor guide

Tech stack
csharp
Domain
performance
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
unclear
Prerequisites
C#compiler internalsperformance profiling
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
10
Research direction
Investigate the performance bottleneck in Roslyn's compiler when handling classes with a large number of methods. Examine the syntax tree and binding stages, using profiling tools to identify slow paths. Consider adding a test case for large classes as suggested in the issue.