Typing delay is a pet peeve of mine. This is why I have stuck with Sublime and Vim even though there are more powerful editors out there like VsCode or PyCharm.
I find VS Code to be just about the only electron-based editor I can use without getting frustrated with typing latency. It's usually not noticeable unless the process is chugging for unrelated reasons.
If you want a fast editor, switch to Sublime 3.