我想在powershell上实现一个缓存存储，以便在下一次运行时加快运行速度

function Save-Cache {
    param (
        [string]$Key,
        [object]$Value,
        [string]$CachePath = "$env:TEMP\PowerShellCache"
    )

    if (-not (Test-Path $CachePath)) {
        New-Item -ItemType Directory -Path $CachePath | Out-Null
    }

    $FilePath = Join-Path -Path $CachePath -ChildPath "$Key.json"
    $Value | ConvertTo-Json | Out-File -FilePath $FilePath
}

function Get-Cache {
    param (
        [string]$Key,
        [string]$CachePath = "$env:TEMP\PowerShellCache"
    )

    $FilePath = Join-Path -Path $CachePath -ChildPath "$Key.json"

    if (Test-Path $FilePath) {
        $jsonContent = Get-Content -Path $FilePath -Raw
        return $jsonContent | ConvertFrom-Json
    }

    return $null
}

# 假设我们有一个耗时的操作
function Get-SomeData {
    Start-Sleep -Seconds 5 # 模拟耗时操作
    return @{ Data = "Some important data" }
}

$cacheKey = "MyImportantData"

# 尝试从缓存中读取数据
$cachedData = Get-Cache -Key $cacheKey

if ($cachedData -eq $null) {
    # 如果缓存中没有数据，则执行耗时操作并保存结果
    $freshData = Get-SomeData
    Save-Cache -Key $cacheKey -Value $freshData
    Write-Output "Data fetched and cached."
} else {
    Write-Output "Data loaded from cache."
}

$cachedData