TS Server keeps checking for files under node_modules/@typescript even when that directory doesn't exist

[mjbvz]

Related to #52695

Bug Report

🔎 Search Terms

• fs.stat
• statSync
• performance

Problem

Create a simple project with a single .js file and a node_modules directory. I noticed that this results in typescript checking for the existence of the standard lib files under node_modules/@typescript:

stat /Users/matb/projects/san/node_modules/@typescript/lib-es2015/promise
stat /Users/matb/projects/TypeScript/built/local/lib.es2015.promise.d.ts
stat /Users/matb/projects/TypeScript/built/local/lib.es2015.promise.d.ts
readFile 45444 0.0653829574584961ms /Users/matb/projects/TypeScript/built/local/lib.es2015.promise.d.ts

It makes two of these checks for every lib file, even though node_modules/@typescript does not exist. The results in 100 or so extra stat calls when you open a simple project consisting of a single .js file

Could we avoid hitting the file system if the parent node_modules/@typescript directory not exist? These calls are fast enough on desktop but are slower on web