Reports fs.exists() to be blocking with Node V8.x

I am surprised to see that fs.exists() blocks. Please clarify. Thanks

blocked-at V1.1.2 Node JS V8.9.4

[2018/07/03 11:25:45.933] [INFO] { blockedFor: 1054.224799987793, stack: [ ' at Object.fs.exists (fs.js:310:11)', ' at getXYZ (C:\dev\prj1\routes\XYZ.js:122:10)', ' at h.XYZ (C:\dev\prj1\routes\XYZ.js:69:37)', ' at Layer.handle [as handle_request] (C:\dev\prj1\node_modules\express\lib\router\layer.js:95:5)', ' at trim_prefix (C:\dev\prj1\node_modules\express\lib\router\index.js:312:13)', ' at C:\dev\prj1\node_modules\express\lib\router\index.js:280:7', ' at Function.process_params (C:\dev\prj1\node_modules\express\lib\router\index.js:330:12)', ' at next (C:\dev\prj1\node_modules\express\lib\router\index.js:271:10)', ' at SendStream.error (C:\dev\prj1\node_modules\serve-static\index.js:121:7)', ' at emitOne (events.js:116:13)', ' at SendStream.emit (events.js:211:7)', ' at SendStream.error (C:\dev\prj1\node_modules\send\index.js:275:17)', ' at SendStream.onStatError (C:\dev\prj1\node_modules\send\index.js:392:12)', ' at onstat (C:\dev\prj1\node_modules\send\index.js:674:26)', ' at FSReqWrap.oncomplete (fs.js:152:21)' ] }