PowerShell 7.3 - implementing Reading Large CSV Files into Memory Efficiently
I keep running into I'm working on a personal project and I'm trying to read a large CSV file (over 1 million rows) using PowerShell 7.3, but I keep running into memory issues. My goal is to process the data row by row to avoid loading the entire file into memory at once. I initially tried using `Import-Csv`, but it appears to consume a lot of memory, leading to slow performance and even crashing my session on occasion. Here is the code I used: ```powershell $csvPath = "C:\path\to\largefile.csv" $csvData = Import-Csv -Path $csvPath foreach ($row in $csvData) { # Process each row - just an example Write-Output $row.ColumnName } ``` This approach isn’t working as expected because the entire file is loaded into memory. I also attempted to use `Get-Content` in combination with `ConvertFrom-Csv` to handle it line by line: ```powershell $csvPath = "C:\path\to\largefile.csv" Get-Content -Path $csvPath | ConvertFrom-Csv | ForEach-Object { # Process each line Write-Output $_.ColumnName } ``` However, this still results in high memory consumption and is notably slow since `ConvertFrom-Csv` processes the entire output in memory as well. I even tried to increase the memory limits in my PowerShell session, but that hasn't helped. Is there a more efficient way to read and process large CSV files in PowerShell, preferably in a way that minimizes memory usage? Any suggestions or best practices would be greatly appreciated! My development environment is Ubuntu. Has anyone else encountered this? I'm coming from a different tech stack and learning Powershell. I'd be grateful for any help. I'm working on a web app that needs to handle this. Has anyone dealt with something similar?