dotnet/runtime

Infra: Reduce build time to perform CLR up-to-date check

Open

#47,022 opened on Jan 15, 2021

View on GitHub
 (10 comments) (5 reactions) (0 assignees)C# (5,445 forks)batch import
area-Infrastructurehelp wanted

Repository metrics

Stars
 (17,886 stars)
PR merge metrics
 (Avg merge 12d 11h) (661 merged PRs in 30d)

Description

The time being measured is the time needed to build the clr subset, after the subset has been completely built already.

If this time were low enough, under 5 seconds or so, it would be feasible to add it as a dependency to other subsets. As it is, it takes roughly 51s on my machine.

Ongoing list of work items, to be updated until we're at 5 secons or less:

  • Incrementally crossgen System.Private.CoreLib
  • clretwrc appears to always be rebuilt
  • Switch to Ninja in Windows by default
    • This will require a workflow for building and preserving VS project files
  • Consider changing the default meaning of clr partition
    • Linux DAC is built by default on Windows (this is expensive. We could try to make it cheaper, or move it out of dev build)
    • CLR managed tools are built as part of CLR

Contributor guide

Research direction
Analyze the current build process of the CLR subset, identify steps that take the most time, and optimize them. Focus on items listed such as clretwrc rebuild and default partition meaning.
Tech stack
csharp
Domain
build systeminfrastructureperformance
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitBuild tools
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40