tsserver maxing out CPU "WatchType: Directory of Failed lookup locations in module resolution"

[Tyriar]

TypeScript Version: 2.7.0-insiders.20180117

Search Terms: directorywatcher

Today's VS Code Insider seeings tsserver maxing out the CPU after a few minutes (under Microsoft/vscode codebase). Verbose logs are just pages and pages of this:

Info 27855[10:7:22.843] DirectoryWatcher recursive:: Elapsed: 24ms Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/workbench/parts/welcome/walkThrough/electron-browser/editor PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27856[10:7:22.843] DirectoryWatcher recursive:: Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/workbench/parts/welcome/walkThrough/electron-browser/walkThroughPart.css PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27857[10:7:22.869] DirectoryWatcher recursive:: Elapsed: 26ms Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/workbench/parts/welcome/walkThrough/electron-browser/walkThroughPart.css PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27858[10:7:22.869] DirectoryWatcher recursive:: Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/base/test/node/extfs/fixtures/examples/company.jxs PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27859[10:7:22.896] DirectoryWatcher recursive:: Elapsed: 27ms Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/base/test/node/extfs/fixtures/examples/company.jxs PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27860[10:7:22.896] DirectoryWatcher recursive:: Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/base/test/node/extfs/fixtures/examples/conway.jxs PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27861[10:7:22.920] DirectoryWatcher recursive:: Elapsed: 24ms Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/base/test/node/extfs/fixtures/examples/conway.jxs PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution
Info 27862[10:7:22.920] DirectoryWatcher recursive:: Trigger: /Users/daimms/dev/Microsoft/vscode/out/vs/base/test/node/extfs/fixtures/examples/employee.jxs PathInfo: /Users/daimms/dev/Microsoft/vscode Project: /Users/daimms/dev/Microsoft/vscode/src/tsconfig.json WatchType: Directory of Failed lookup locations in module resolution

[sheetalkamat]

Can you please check if #21281 helps?