Thread Job

Thread job is running on the same process of PowerShell instance, so it's faster than other job types.

Create Thread Job PowerShell 6+

Thread job utils was added since PowerShell 6, if you want to use it in lower version, install the module with this command:

inmo ThreadJob -Scope CurrentUser

The usage of Start-ThreadJob is similar to Start-Job. A -ScriptBlock or -FilePath should be specified as the action of the job. Start-ThreadJob returns a ThreadJob to represent the state of the job.

$job = Start-ThreadJob { foo }
$job.GetType().Name # ThreadJob

Multiple Thread Jobs PowerShell 7+

ForEach-Object supports creating parallel thread job from pipeline input since PowerShell 7.

• -Parallel: perform each action on pipeline item in parallel, requires a scripblock.
• -AsJob: return an object with child jobs.

-AsJob returns a PSTaskJob object that contains all child jobs representing each action on pipeline item.

1..10 | foreach -Parallel { echo $_ } -AsJob | rcjb -Wait

Thread Safety

Do not mutate or access member of a shared variable in thread jobs unless you use thread-safe types!