Crash when copying large amounts of data to clipboard

[djpereira]

• VSCode Version: 1.0.0
• OS Version: Windows 10 v1511

Steps to Reproduce:

1. Open a large file (35MB or more).
2. Select All (Ctrl+A)
3. Copy to clipboard (Ctrl+C)

The file opens and you can navigate very quickly. That works great, but trying to copy the whole file to clipboard makes the app crash. I am not sure there are any logs that I can pull to help diagnose the problem.

[alexdima]

I think it is an OOM crash. I don't think we do anything stupid on Ctrl+C:

• we create a big fat JS string with all the text
• we call event.clipboardData.setData('text/plain', text);

Most likely this crashes when creating the big fat JS string with all the text.

[alexdima]

I have taken the following 4MB file and copy-pasted it 12 times until I got a file that is 50MB:

editor.main.zip

I then opened that file in vs code and successfully did ctrl+a and ctrl+c and had the text in the clipboard. I pasted it in a different instance of VS Code. The renderer process consumes 430MB for me in this case.

This OOM can be avoided if we would ship a 64 bit version on Windows. #21640