Yes, that is clearly what is happening. I was just wondering why the data gets flushed to disk before I can type the next line into J. I would have expected that there would be a buzz of disk activity while subsequent J sentences are being executed, but it seems that something is preventing execution from continuing until the files are synced out to the disk. I'm just curious.
When I said "Roger is in there doing something" I was reverting to the way I talk to the highschoool kids. Rather than say, "the interpreter executes your sentence" I just say, "Roger executes your sentence from right to left", or "Roger can't make any sense of what you just typed". They enjoy all the things Roger does for them. Henry Rich > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Eric Iverson > Sent: Sunday, April 27, 2008 6:11 PM > To: Programming forum > Subject: Re: [Jprogramming] Does J flush files before > returning toimmediatemode? > > In working on a project recently with many large files I have > observed > something that may be related to your experience. The host > seems to do > buffering that makes file io very quick. By quick I mean that > the io appears > finished to J so that J can continue but there is still > processing to be > done by the host to really get them on disk. But if there is > enough io > things eventually slow down so you see the real time to get > the bytes to > disk. Another way of thinking of this is that io for the > first hundreds of > magabytes is artificially fast, but after some point it > starts to be a > linear time per byte. > > ----- Original Message ----- > From: "Henry Rich" <[EMAIL PROTECTED]> > To: "'Programming forum'" <[email protected]> > Sent: Sunday, April 27, 2008 3:55 PM > Subject: [Jprogramming] Does J flush files before returning to > immediatemode? > > > > I'm curious about a behavior I have seen. > > > > I have a program that creates a few hundred files using > 1!:2, and types > > a message as it creates each one. Files are about 4MB each. > > > > It zips through them, and the messages fly by. But then, > after all the > > messages have been typed, there is a delay of maybe 10 > seconds before > > J will accept another command. The program is finished, > but Roger is > > in there doing something. > > > > Any idea what? > > > > Henry Rich > > > > > > > > > > > ---------------------------------------------------------------------- > > For information about J forums see > http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
