When using the *sync functions in Node.js, what (if any) background operations continue to run <p>When using the Node.js *Sync functions (I understand you shouldn't, and the reasons why), what (if any) background processes continue to run?</p> <p>For example, if I'm using http.createServer, and from one of the requests I call fs.writeFileSync(), will the server continue to serve new clients whilst that write is in progress (not just accept the connection, but process the entire request)? I.e. would writeFileSync() block the entire process, or just the current call chain?</p>