What's New in PowerShell 7.5
PowerShell 7.5-rc.1 includes the following features, updates, and breaking changes. PowerShell 7.5 is built on .NET 9.0.100 GA release.
For a complete list of changes, see the CHANGELOG in the GitHub repository.
Breaking Changes
- Fix
-OlderThan
and-NewerThan
parameters forTest-Path
when usingPathType
and date range (#20942) (Thanks @ArmaanMcleod!)- Previously
-OlderThan
would be ignored if specified together
- Previously
- Change
New-FileCatalog -CatalogVersion
default to 2 (#20428) (Thanks @ThomasNieto!) - Block getting help from network locations in restricted remoting sessions (#20593)
- The Windows installer now remembers installation options used and uses them to initialize options for the next installation (#20420) (Thanks @reduckted!)
ConvertTo-Json
now serializesBigInteger
as a number (#21000) (Thanks @jborean93!)
Updated modules
PowerShell 7.5-rc.1 includes the following updated modules:
- Microsoft.PowerShell.PSResourceGet v1.1.0-RC2
- PSReadLine v2.3.6
Tab completion improvements
Many thanks to @ArmaanMcleod and others for all their work to improve tab completion.
- Fall back to type inference when hashtable key-value cannot be retrieved from safe expression (#21184) (Thanks @MartinGC94!)
- Fix the regression when doing type inference for
$_
(#21223) (Thanks @MartinGC94!) - Expand
~
to$home
on Windows with tab completion (#21529) - Don't complete when declaring parameter name and class member (#21182) (Thanks @MartinGC94!)
- Prevent fallback to file completion when tab completing type names (#20084) (Thanks @MartinGC94)
- Add argument completer to
-Version
forSet-StrictMode
(#20554) (Thanks @ArmaanMcleod!) - Add
-Verb
argument completer forGet-Verb
/Get-Command
and refactorGet-Verb
(#20286) (Thanks @ArmaanMcleod) - Add
-Verb
argument completer forStart-Process
(#20415) (Thanks @ArmaanMcleod) - Add
-Scope
argument completer for*-Variable
,*-Alias
&*-PSDrive
commands (#20451) (Thanks @ArmaanMcleod) - Add
-Module
completion forSave-Help
/Update-Help
commands (#20678) (Thanks @ArmaanMcleod)
New cmdlets
- Add
ConvertTo-CliXml
andConvertFrom-CliXml
cmdlets (#21063) (Thanks @ArmaanMcleod!)
Web cmdlets improvements
- Fix to allow
-PassThru
and-Outfile
work together (#24086) - Add
OutFile
property inWebResponseObject
(#24047) - Show filename in
Invoke-WebRequest -OutFile -Verbose
(#24041) - Fix WebCmdlets when
-Body
is specified butContentType
is not (#23952) (Thanks @CarloToso!) - Fix
Invoke-WebRequest
to report correct size when-Resume
is specified (#20207) (Thanks @LNKLEO!) - Fix Web Cmdlets to allow
WinForm
apps to work correctly (#20606)
Other cmdlet improvements
- Enable
-NoRestart
to work withRegister-PSSessionConfiguration
(#23891) - Add
IgnoreComments
andAllowTrailingCommas
options toTest-Json
cmdlet (#23817) (Thanks @ArmaanMcleod!) - Get-Help may report parameters with
ValueFromRemainingArguments
attribute as pipeline-able (#23871) - Change type of
LineNumber
toulong
inSelect-String
(#24075) (Thanks @Snowman-25!) Get-Process
: Remove admin requirement for-IncludeUserName
(#21302) (Thanks @jborean93!)- Fix
Test-Path -IsValid
to check for invalid path and filename characters (#21358) - Add
RecommendedAction
toConciseView
of the error reporting (#20826) (Thanks @JustinGrote!) - Added progress bar for
Remove-Item
cmdlet (#20778) (Thanks @ArmaanMcleod!) - Fix
Test-Connection
due to .NET 8 changes (#20369) - Fix
Get-Service
non-terminating error message to include category (#20276) - Add
-Empty
and-InputObject
parameters toNew-Guid
(#20014) (Thanks @CarloToso!) - Add the alias
r
to the parameter-Recurse
for theGet-ChildItem
command (#20100) (Thanks @kilasuit!) - Add
LP
toLiteralPath
aliases for functions still missing it (#20820) - Add implicit localization fallback to
Import-LocalizedData
(#19896) (Thanks @chrisdent-de!) - Add
Aliases
to the properties shown up when formatting the help content of the parameter returned byGet-Help
(#20994) - Add
HelpUri
toRemove-Service
(#20476) - Fix completion crash for the SCCM provider (#20815, #20919, #20915) (Thanks @MartinGC94!)
- Fix regression in
Get-Content
when-Tail 0
and-Wait
are used together (#20734) (Thanks @CarloToso!) - Fix
Start-Process -PassThru
to make sure theExitCode
property is accessible for the returnedProcess
object (#20749) (Thanks @CodeCyclone!) - Fix
Group-Object
to use current culture for its output (#20608) - Fix
Group-Object
output using interpolated strings (#20745) (Thanks @mawosoft!) - Fix rendering of
DisplayRoot
for networkPSDrive
(#20793) - Fix
Copy-Item
progress to only show completed when all files are copied (#20517) - Fix UNC path completion regression (#20419) (Thanks @MartinGC94!)
- Report error if invalid
-ExecutionPolicy
is passed topwsh
(#20460) - Add WinGetCommandNotFound and CompletionPredictor modules to track usage (#21040)
- Add DateKind parameter to
ConvertFrom-Json
(#20925) (Thanks @jborean93!) - Add DirectoryInfo to the OutputType for New-Item (#21126) (Thanks @MartinGC94!)
- Fix
Get-Error
serialization of array values (#21085) (Thanks @jborean93!) - Fix
Test-ModuleManifest
so it can use a UNC path (#24115) - Fix
Get-TypeData
to write to the pipeline immediately instead of collecting data first (#24236) (Thanks @MartinGC94) - Add
-Force
parameter toResolve-Path
andConvert-Path
cmdlets to support wildcard hidden files #20981 (Thanks @ArmaanMcleod!)
Engine improvements
- Explicitly start and stop ANSI Error Color (#24065) (Thanks @JustinGrote!)
- Improve .NET overload definition of generic methods (#21326) (Thanks @jborean93!)
- Optimize the
+=
operation for a collection when it's an object array (#23901) (Thanks @jborean93!) - Add telemetry to check for specific tags when importing a module (#20371)
- Add
PSAdapter
andConsoleGuiTools
to module load telemetry allowlist (#20641) - Add Winget module to track usage (#21040)
- Ensure the filename is not null when logging WDAC ETW events (#20910) (Thanks @jborean93!)
- Fix four regressions introduced by the WDAC logging feature (#20913)
- Leave the input, output, and error handles unset when they are not redirected (#20853)
- Fix implicit remoting proxy cmdlets to act on common parameters (#20367)
- Include the module version in error messages when module is not found (#20144) (Thanks @ArmaanMcleod!)
- Fix
unixmode
to handlesetuid
andsticky
when file is not an executable (#20366) - Fix using assembly to use Path.Combine when constructing assembly paths (#21169)
- Validate the value for using namespace during semantic checks to prevent declaring invalid namespaces (#21162)
- Handle global tool specially when prepending
$PSHome
to PATH (#24228)
Experimental features
The following experimental features were converted to mainstream features in PowerShell 7.5-rc.1:
The following experimental features are included in PowerShell 7.5-rc.1:
- PSRedirectToVariable - Allow redirecting to a variable (#20381)
- PSNativeWindowsTildeExpansion - Add tilde expansion for windows native executables (#20402) (Thanks @domsleee!)
- PSSerializeJSONLongEnumAsNumber -
ConvertTo-Json
now treats large enums as numbers (#20999) (Thanks @jborean93!)
Performance improvements
PowerShell 7.5-rc.1 included PR#23901 from @jborean93 that improves the performance of the
+=
operation for an array of objects.
The following example measures the performance for different methods of adding elements to an array.
$tests = @{
'Direct Assignment' = {
param($count)
$result = foreach($i in 1..$count) {
$i
}
}
'List<T>.Add(T)' = {
param($count)
$result = [Collections.Generic.List[int]]::new()
foreach($i in 1..$count) {
$result.Add($i)
}
}
'Array+= Operator' = {
param($count)
$result = @()
foreach($i in 1..$count) {
$result += $i
}
}
}
5kb, 10kb | ForEach-Object {
$groupResult = foreach($test in $tests.GetEnumerator()) {
$ms = (Measure-Command { & $test.Value -Count $_ }).TotalMilliseconds
[pscustomobject]@{
CollectionSize = $_
Test = $test.Key
TotalMilliseconds = [math]::Round($ms, 2)
}
[GC]::Collect()
[GC]::WaitForPendingFinalizers()
}
$groupResult = $groupResult | Sort-Object TotalMilliseconds
$groupResult | Select-Object *, @{
Name = 'RelativeSpeed'
Expression = {
$relativeSpeed = $_.TotalMilliseconds / $groupResult[0].TotalMilliseconds
$speed = [math]::Round($relativeSpeed, 2).ToString() + 'x'
if ($speed -eq '1x') { $speed } else { $speed + ' slower' }
}
} | Format-Table -AutoSize
}
When you run the script in PowerShell 7.4.6, you see that using the +=
operator is the slowest
method.
CollectionSize Test TotalMilliseconds RelativeSpeed
-------------- ---- ----------------- -------------
5120 Direct Assignment 4.17 1x
5120 List<T>.Add(T) 90.79 21.77x slower
5120 Array+= Operator 342.58 82.15x slower
CollectionSize Test TotalMilliseconds RelativeSpeed
-------------- ---- ----------------- -------------
10240 Direct Assignment 0.64 1x
10240 List<T>.Add(T) 184.10 287.66x slower
10240 Array+= Operator 1668.13 2606.45x slower
When you run the script in PowerShell 7.5-rc.1, you see that using the +=
operator is much faster
than PowerShell 7.4.6. Now, it's also faster than using the List<T>.Add(T)
method.
CollectionSize Test TotalMilliseconds RelativeSpeed
-------------- ---- ----------------- -------------
5120 Direct Assignment 4.71 1x
5120 Array+= Operator 40.42 8.58x slower
5120 List<T>.Add(T) 92.17 19.57x slower
CollectionSize Test TotalMilliseconds RelativeSpeed
-------------- ---- ----------------- -------------
10240 Direct Assignment 1.76 1x
10240 Array+= Operator 104.73 59.51x slower
10240 List<T>.Add(T) 173.00 98.3x slower