Powershell write to file fast

The important thing is that it will expand wildcard lookups for you. You will get an array of values if there are more than one matche. I commonly use this on any path value that I get as user input into my functions that accept multiple files. I find it as an easy way to add wildcard support to parameters. Now that we have all those helper CmdLets out of the way, we can talk about the options we have for saving and reading data. I do this to keep the samples cleaner and it better reflects how you would use them in a script.

PowerShell was introduced with Out-File as the way to save data to files. Here is what the help on that looks like. Here is a sample of how to use it. It is a basic command and we have had it for a long time. Here is a second example that shows some of the limitations. You can see that the last column of values are cut short.

Out-File is processing objects for the console but redirects the output to a file. All the issues you have getting something to format in the console will show up in your output file. The good news is that we have lots of other options for this that I will cover below. There is also a Get-Content command that goes with them to read file data. Add-Content will create and append to files.

Set-Content will create and overwrite files. These are good all-purpose commands as long as performance is no a critical factor in your script. They are great for individual or small content requests. For large sets of data where performance matters more than readability, we can turn to the.

Net framework. I will come back to this one. Get-Content is the goto command for reading data. By default, this command will read each line of the file. Notify me of new posts via email. The test results The first thing to notice when the script is complete is that the different write types give different file sizes.

The test results In screenshots: The first one is a screenshot of test results as put into an Excel sheet and comparing 3 test runs; the second one is a screenshot of the results of the script with its default parameters, thus all tests and lines per file; the third one is a screenshot of the results of the script with 50 million lines MB UTF-8 file written and only the quickest 2 writing methods.

The amount of lines to write to each test file. If you want only the quickest 2 writers, set the value to 6, if you want to include WriteAllLines set it to 5 which can also be pretty quick, depending on amount of lines and file size Once you set the testlines value above 1 million, it is advised to only start from writing method 5; and loop test 2. Share this:. Like this: Like Loading Published by Powershell Administrator. Previous Post Download SolarEdge solar production data and save to csv.

Would you be able to provide some guidance on an approach that I can investigate? I cannot download the powershell in this post due to corporate restrictions on downloads Like Like. Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public. Name required. Follow Following. Powershell Administrator Blog Join other followers. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

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