Curious if you tried with extensions disabled? I just attempted opening both a 100k and 1m line html file in both VS Code and ST, in the 100k case they both wer

Curious if you tried with extensions disabled? I just attempted opening both a 100k and 1m line html file in both VS Code and ST, in the 100k case they both were quick to open but Code was a bit smoother in scrolling, in the 1m case ST took a long time to open (showed a loading progress bar for a few seconds before anything), and while Code was choppy to scroll ST was almost unusable. That being said, with extensions enabled it can be a totally different story - some extensions will try to load the text content on every editor opening or even edit, which gets unusable very quickly. (Yes they run in a separate process, but that’s not a cure-all) Tested on 2018 MBP. (On VS code team, had nothing to do with the editor perf)