haskell/hie-bios

Decrease priority of compilation jobs to increase UX responsiveness.

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#399 opened on Mar 18, 2023

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ZuriHacgood first issue

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Description

HIE is expected to respond to events quickly, just like its ancestor is expected to be UI process. However, the compilations are generally batch jobs that can take longer time to complete, and should not delay UI.

I suggest we use System.Process.nice to decrease priority of any compilation job we call. That assures our interactivity is unhindered when we open a big project, and start compiling it with all numCapabilities.

This continues discussion from here:

https://github.com/haskell/haskell-language-server/issues/3528

Contributor guide

Research direction
Find where compilation jobs are started and learn how to apply System.Process.nice to reduce their priority. Review the linked discussion for background.
Tech stack
haskell
Domain
build systemdeveloper experience
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Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
HaskellGit
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75