3 ms·

My argument is that most things that potentially take a lot of time are blocking by default in Python, which makes it a bad fit for making non-blocking servers.

• BarkMore 16y ago
  I am arguing that a small number of things take a long time in a web server. Can you give some examples of things that potentially take a long time in a web server that are not already covered by Tornado (http client, long polling)?
  • amix 16y ago
    Database drivers (Redis, MySQL, Tokyo Tyrant etc.) and a bad query/overheated database server can easily take over 1 sec execution, which would basically stall your servers each time such a query is run. File handling and system calls are blocking in Python. E.g. if your system call is expensive - say you are processing an image via imagemagick, very common for most web applications, then it will block your server.
    • BarkMore 16y ago
      Blocking for short periods of time is fine if you run more than one instance of the python application per core. If database database access is taking more than a second, then I recommend fixing that problem first.