miniblog.

I'm experimenting with diagnostics formatting. * I've added a left margin, showing both the file name and line numbers * I'm showing one line of context above/below the offending line. * I'm using grey for comments. What do you think? Is there anything you'd change?

In LSP, a position is represented as a line number and a column offset (in Unicode code units): https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#position This is pretty elegant. You'll get the correct line regardless of encoding bugs, and the editor already knows the line number so it's cheap to compute.

It's really satisfying to use a profiler for the first time on a project. I always find a big performance win with only a small code change. It's never the code that I expected to be slow, however!