Set-PSReadLineOption is slow when called from profile

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#4,022 15 comments 2 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
csharp, powershell
Domain
cli, performance

Research direction

Start by reproducing the reported Set-PSReadLineOption command in a profile and in a running pwsh session, comparing the measured startup times. Investigate why profile invocation is slower; done means the command has equivalent execution time in both contexts.

Written by the indexing model from the issue text.

Description

Needs-Triage :mag:
Prerequisites
  • Write a descriptive title.
  • Make sure you are able to repro it on the latest released version
  • Search the existing issues, especially the pinned issues.
Exception report
N/A
Screenshot

measure-command { Set-PSReadLineOption -HistoryNoDuplicates -EditMode Windows }

image
image

Environment data
PS Version: 7.4.2
PS HostName: ConsoleHost
PSReadLine Version: 2.3.5
PSReadLine EditMode: Windows
OS: 10.0.22621.1 (WinBuild.160101.0800)
BufferWidth: 181
BufferHeight: 23
Steps to reproduce

This has been reported in #476, but closed without much context been provided.
Set-PSReadLineOption calling from profile will take much longer than calling from a running pwsh. Adding a single line of Set-PSReadLineOption in profile delays start up time over 100 ms. I wonder how is the 11 ms load time is achieved mentioned in that issue and what can I do to ease the issue.

Expected behavior

Same execution time when running from profile.

Actual behavior

Much longer execution time in profile.

Dominant language
C#
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