Performance issue with PowerShell when using Oh My Posh theme

[JeroenVanHees]

Code of Conduct

• I agree to follow this project's Code of Conduct

What happened?

I'm experiencing significant slowness when using PowerShell with the Oh My Posh theme configured (paradox.omp.json). There is a noticeable delay when starting the terminal session and when executing commands, which is considerably slower than expected. Despite trying various optimizations, the performance has not improved.

Steps to Reproduce:

1. Install Oh My Posh and PowerShell 7.x.
2. Use the following command to initialize the theme:
   oh-my-posh init pwsh --config "$env:POSH_THEMES_PATH\paradox.omp.json" | Invoke-Expression
3. Open PowerShell, and observe the slow startup time and delays during command execution.

System Information:

• Windows 10 Version: 10.0.22631.5039
• PowerShell Version: 7.5.0
• Oh My Posh Theme: paradox.omp.json

Expected Behavior:
PowerShell should start up quickly and respond without noticeable delays, similar to default configurations or other terminal applications.

Actual Behavior:
There is a significant delay during startup and when typing/performing commands.

Additional Information:
I have already attempted various optimizations, including excluding PowerShell from Windows Defender, but the performance issue persists.

Theme

paradox.omp.json

What OS are you seeing the problem on?

Windows

Which shell are you using?

powershell

Log output

 Jeroen@LaptopJeroen  ~ 
❯ oh-my-posh debug --plain

Version: 25.6.0

Shell: pwsh (7.5.0)

Prompt:

 Jeroen@LaptopJeroen  ~ 
❯

Segments:

ConsoleTitle(false)                       -   0 ms
Root(false)                               -   0 ms
Session(true)                             -   0 ms
Path(true)                                -   1 ms
Git(false)                                -   6 ms
Python(false)                             -   1 ms
Status(false)                             -   1 ms
Text(true)                                -   0 ms

Run duration: 9.8918ms

Cache path: C:\Users\jeroe\AppData\Local\oh-my-posh

Config path: C:\Users\jeroe\AppData\Local\Programs\oh-my-posh\themes\paradox.omp.json

Logs:

[DEBUG] 16:08:14.117 debug.go:36 → debug mode enabled
[DEBUG] 16:08:14.118 load.go:Path:79 → config set using POSH_THEME: C:\Users\jeroe\AppData\Local\Programs\oh-my-posh\themes\paradox.omp.json
[TRACE] 16:08:14.118 load.go:Path() - 0s
[TRACE] 16:08:14.119 load.go:loadConfig() - 1.1636ms
[TRACE] 16:08:14.119 load.go:Load() - 1.1636ms
[DEBUG] 16:08:14.119 terminal.go:Init:54 → plain mode enabled
[TRACE] 16:08:14.119 path.go:Path() - 51.3µs
[DEBUG] 16:08:14.119 file.go:Init:26 → loading cache file: C:\Users\jeroe\AppData\Local\oh-my-posh\omp.cache
[DEBUG] 16:08:14.119 file.go:Init:47 → loading cache key: upgrade_check
[TRACE] 16:08:14.119 file.go:Init(C:\Users\jeroe\AppData\Local\oh-my-posh\omp.cache) - 0s
[TRACE] 16:08:14.119 path.go:Path() - 0s
[DEBUG] 16:08:14.119 file.go:Init:26 → loading cache file: C:\Users\jeroe\AppData\Local\oh-my-posh\omp.cache.eb7014c3-9723-4134-b021-e8bf2eed9bb1
[DEBUG] 16:08:14.119 file.go:Init:47 → loading cache key: prompt_count_cache
[TRACE] 16:08:14.119 file.go:Init(C:\Users\jeroe\AppData\Local\oh-my-posh\omp.cache.eb7014c3-9723-4134-b021-e8bf2eed9bb1) - 0s
[TRACE] 16:08:14.119 terminal.go:setPromptCount() - 0s
[TRACE] 16:08:14.119 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.119 terminal.go:setPwd:115 → C:\Users\jeroe
[TRACE] 16:08:14.119 terminal.go:setPwd() - 0s
[TRACE] 16:08:14.119 terminal.go:Init() - 51.3µs
[TRACE] 16:08:14.119 terminal.go:Shell() - 0s
[TRACE] 16:08:14.119 terminal.go:Flags() - 0s
[TRACE] 16:08:14.119 cache.go:restoreCache() - 0s
[TRACE] 16:08:14.120 terminal_windows.go:Root() - 546µs
[TRACE] 16:08:14.120 terminal.go:Shell() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:StatusCodes() - 0s
[TRACE] 16:08:14.120 terminal_windows.go:IsWsl() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.120 terminal_windows.go:IsWsl() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 terminal.go:User:249 → Jeroen
[TRACE] 16:08:14.120 terminal.go:User() - 0s
[DEBUG] 16:08:14.120 terminal.go:Host:266 → LaptopJeroen
[TRACE] 16:08:14.120 terminal.go:Host() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → NO DATA
[TRACE] 16:08:14.120 terminal.go:Getenv(SHLVL) - 0s
[DEBUG] 16:08:14.120 writer.go:Init:105 → terminal program: Unknown
[DEBUG] 16:08:14.120 writer.go:Init:106 → terminal shell: shell
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → NO DATA
[TRACE] 16:08:14.120 terminal.go:Getenv(OMP_CACHE_DISABLED) - 0s
[TRACE] 16:08:14.120 terminal_windows.go:WindowsRegistryKeyValue(HKEY_CURRENT_USER\Software\Microsoft\Windows\DWM\ColorizationColor) - 0s
[DEBUG] 16:08:14.120 terminal_windows.go:WindowsRegistryKeyValue:198 → ColorizationColor(DWORD): 0xC4D0000C
[TRACE] 16:08:14.120 colors_windows.go:GetAccentColor() - 0s
[TRACE] 16:08:14.120 colors.go:SetAccentColor() - 0s
[TRACE] 16:08:14.120 terminal.go:Shell() - 0s
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → 7.5.0
[TRACE] 16:08:14.120 terminal.go:Getenv(POSH_SHELL_VERSION) - 0s
[DEBUG] 16:08:14.120 debug.go:PrintDebug:24 → segment: Title
[TRACE] 16:08:14.120 text.go:Render() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → 34
[TRACE] 16:08:14.120 terminal.go:Getenv(POSH_CURSOR_LINE) - 0s
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → 1
[TRACE] 16:08:14.120 terminal.go:Getenv(POSH_CURSOR_COLUMN) - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 segment.go:Execute:111 → segment: Status
[DEBUG] 16:08:14.120 home.go:12 → C:\Users\jeroe
[DEBUG] 16:08:14.120 segment.go:isToggled:228 → no toggles found
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 segment.go:Execute:111 → segment: Root
[DEBUG] 16:08:14.120 segment.go:isToggled:228 → no toggles found
[TRACE] 16:08:14.120 terminal.go:StatusCodes() - 0s
[DEBUG] 16:08:14.120 properties.go:GetString:28 → status_template: {{ .Code }}
[TRACE] 16:08:14.120 terminal_windows.go:Root() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 segment.go:Execute:111 → segment: Path
[DEBUG] 16:08:14.120 segment.go:isToggled:228 → no toggles found
[DEBUG] 16:08:14.120 properties.go:GetBool:22 → display_cygpath: false
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.120 separator.go:Separator() - 0s
[TRACE] 16:08:14.120 terminal.go:Shell() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 properties.go:GetBool:22 → mapped_locations_enabled: true
[DEBUG] 16:08:14.120 properties.go:GetString:28 → windows_registry_icon: 
[DEBUG] 16:08:14.120 properties.go:GetString:28 → windows_registry_icon: 
[DEBUG] 16:08:14.120 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.120 separator.go:Separator() - 0s
[TRACE] 16:08:14.120 text.go:Render(powerline) - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 properties.go:GetString:28 → home_icon: ~
[DEBUG] 16:08:14.120 properties.go:GetKeyValueMap:46 → mapped_locations: map[]
[TRACE] 16:08:14.120 separator.go:Separator() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.120 separator.go:Separator() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 properties.go:GetStringArray:52 → cycle: []
[DEBUG] 16:08:14.120 properties.go:GetString:28 → folder_separator_template:
[DEBUG] 16:08:14.120 properties.go:GetString:28 → folder_separator_icon:  
[DEBUG] 16:08:14.120 properties.go:GetBool:22 → cycle_folder_separator: false
[DEBUG] 16:08:14.120 properties.go:GetString:28 → folder_format: %s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.120 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.120 segment.go:Execute:111 → segment: Session
[DEBUG] 16:08:14.120 segment.go:isToggled:228 → no toggles found
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → NO DATA
[TRACE] 16:08:14.120 terminal.go:Getenv(SSH_CONNECTION) - 0s
[DEBUG] 16:08:14.120 terminal.go:Getenv:77 → NO DATA
[TRACE] 16:08:14.120 terminal.go:Getenv(SSH_CLIENT) - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[TRACE] 16:08:14.120 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.120 properties.go:GetString:28 → edge_format: %s
[DEBUG] 16:08:14.121 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.121 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.121 properties.go:GetString:28 → left_format: %s
[DEBUG] 16:08:14.121 properties.go:GetString:28 → right_format: %s
[TRACE] 16:08:14.121 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.121 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.121 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.121 terminal.go:GOOS() - 0s
[TRACE] 16:08:14.121 terminal.go:StackCount() - 0s
[DEBUG] 16:08:14.121 segment.go:Execute:111 → segment: Git
[DEBUG] 16:08:14.121 segment.go:isToggled:228 → no toggles found
[TRACE] 16:08:14.121 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.121 segment.go:Execute:111 → segment: Python
[DEBUG] 16:08:14.121 segment.go:isToggled:228 → no toggles found
[DEBUG] 16:08:14.121 properties.go:GetString:28 → display_mode: environment
[DEBUG] 16:08:14.121 properties.go:GetStringArray:52 → extensions: [*.py *.ipynb pyproject.toml venv.bak]
[DEBUG] 16:08:14.121 properties.go:GetStringArray:52 → folders: [.venv venv virtualenv venv-win pyenv-win]
[DEBUG] 16:08:14.121 properties.go:GetBool:22 → home_enabled: false
[TRACE] 16:08:14.121 text.go:Render({{ .Code }}) - 1.4107ms
[DEBUG] 16:08:14.121 properties.go:GetBool:22 → always_enabled: false
[DEBUG] 16:08:14.121 text.go:patchTemplate:125 →  {{ .UserName }}@{{ .HostName }}
[TRACE] 16:08:14.121 text.go:Render( {{ .UserName }}@{{ .HostName }} ) - 863.6µs
[TRACE] 16:08:14.121 text.go:Render(powerline) - 0s
[DEBUG] 16:08:14.121 home.go:12 → C:\Users\jeroe
[DEBUG] 16:08:14.122 win32_windows.go:isWriteable:259 → not current user or in group
[DEBUG] 16:08:14.122 win32_windows.go:isWriteable:263 → current user is member of S-1-5-32-544
[DEBUG] 16:08:14.122 win32_windows.go:isWriteable:271 ↓
    WRITE_DAC
    WRITE_OWNER
    SYNCHRONIZE
    DELETE
    READ_CONTROL
[DEBUG] 16:08:14.122 win32_windows.go:isWriteable:273 → user has write access
[TRACE] 16:08:14.122 terminal_windows.go:DirIsWritable() - 1.0657ms
[DEBUG] 16:08:14.122 text.go:patchTemplate:125 →  {{ .Data.Path }}
[TRACE] 16:08:14.122 text.go:Render( {{ .Path }} ) - 0s
[TRACE] 16:08:14.122 text.go:Render(powerline) - 0s
[DEBUG] 16:08:14.126 terminal.go:CommandPath:317 → C:\Program Files\Git\cmd\git.exe
[TRACE] 16:08:14.126 terminal.go:CommandPath(git.exe) - 5.5979ms
[TRACE] 16:08:14.126 terminal.go:HasCommand(git.exe) - 5.5979ms
[DEBUG] 16:08:14.126 properties.go:GetBool:22 → fetch_bare_info: false
[DEBUG] 16:08:14.126 terminal.go:ResolveSymlink:208 → C:\Users\jeroe
[TRACE] 16:08:14.126 terminal.go:ResolveSymlink(C:\Users\jeroe) - 0s
[ERROR] 16:08:14.127 terminal.go:HasParentFilePath:476 → CreateFile .git: The system cannot find the file specified.
[TRACE] 16:08:14.127 terminal.go:HasParentFilePath(.git) - 553.9µs
[TRACE] 16:08:14.127 text.go:Render(powerline) - 0s
[TRACE] 16:08:14.127 text.go:Render(powerline) - 0s
[TRACE] 16:08:14.127 text.go:Render(powerline) - 0s
[TRACE] 16:08:14.127 terminal.go:Shell() - 0s
[TRACE] 16:08:14.127 terminal.go:Flags() - 0s
[DEBUG] 16:08:14.127 home.go:12 → C:\Users\jeroe
[TRACE] 16:08:14.127 terminal.go:GOOS() - 0s
[DEBUG] 16:08:14.127 segment.go:Execute:111 → segment: Text
[DEBUG] 16:08:14.127 segment.go:isToggled:228 → no toggles found
[TRACE] 16:08:14.127 text.go:Render(❯ ) - 0s
[TRACE] 16:08:14.127 text.go:Render(plain) - 0s
[TRACE] 16:08:14.127 terminal.go:Shell() - 0s
[TRACE] 16:08:14.127 terminal.go:Shell() - 0s
[TRACE] 16:08:14.127 path.go:Path() - 0s
[TRACE] 16:08:14.127 terminal.go:Flags() - 0s
 Jeroen@LaptopJeroen  ~ 

[JanDeDobbeleer]

@JeroenVanHees I don't see anything that explains this from our side of things. I can see oh-my-posh takes 9.8918ms to execute the prompt, which is definitely not in line with your experience. Usually that implies something on the device is either locking or monitoring the execution.

[iammmmmmm]

The issue lies in the script executing Invoke-Expression, which takes to 500ms
Is there any way to optimize the 500ms spent by Invoke-Expression?
Besides the 500ms delay of Invoke-Expression, each right-click on the desktop to launch it also incurs an additional 500ms delay, as shown in the screenshot
Is there any way to solve this 500ms?
Thank you for any answers!

Environment information:
wiin1110.0.22631 Build 22631
oh-my-posh version 25.22.0
powershell_version 4391

[JanDeDobbeleer]

No, it still needs to evaluate. You can create an issue at PowerShell for this.

[iammmmmmm]

首先感谢您的回答，然后我不打算再继续深究这个了，因为这是win11，为了解决win11非常难用的ui，我使用了一堆美化程序，我的整个系统充满各种奇奇怪怪的“特性”(比如C:\A\B.exe可以从资源管理器中访问到，但要执行这个exe资源管理器就会说“我找不到”🫠)，powershell启动时间大约最多1.5s平时在1s上下，只是付出这一小点代价就可以换一个好看和易用的命令行是可以接受的.
First, thank you for your answer. Then, I don't plan to delve deeper into this, because it's Windows 11. To solve the very awkward UI of Windows 11, I've used a bunch of beautification programs, and my entire system is filled with all kinds of strange "features" (for example, C:\A\B.exe can be accessed from File Explorer, but when you try to execute this exe, File Explorer says "I can't find it" 🫠). The startup time of PowerShell is about 1.5 seconds at most, usually around 1 second. It's acceptable to pay this small price to get a good-looking and easy-to-use command line.