Disable/speed up console output animation?

[rynoV]

For example this cell takes 16 seconds to run seemingly because the console output is being animated, or just very slowly printed

[jonsequitur]

The performance bottlenecks here would be in two places:

• Serializing and sending 1000 StandardOutputValueProduced event messages
• VS Code's UI rendering of those events

Serializer performance optimizations are something we could fix within his project, although so far this hasn't been a priority because this kind of message volume is unusual in practice.

[rynoV]

I see thanks.

1000 characters doesn't seem like it would be that uncommon, but I guess the standard usage is more like returning a single value at the end of the cell, in which case it's only one value that needs to be serialized?

Switching all my console writes to use a string builder and returning a single string does speed things back up to the expected level

[jonsequitur]

Right, it's not the size of the string. It's the fact that Console.Write (and various other APIs) are sending messages that need to be rendered (and, in the case of .NET Interactive, serialized first). Less chattiness will improve responsiveness. This is also true in an ordinary console app where, for example, you can see a performance improvement for code like this if you redirect output to a file.