Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs Date: Sat, 27 Sep 2003 16:18:13 -0400 (EDT) From: Igor Pechtchanski Reply-To: cygwin AT cygwin DOT com To: Andrew DeFaria cc: cygwin AT cygwin DOT com Subject: Re: ftp way quicker than cp? In-Reply-To: Message-ID: References: Importance: Normal MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII On Sat, 27 Sep 2003, Andrew DeFaria wrote: > Igor Pechtchanski wrote: > > > You are not really measuring the time needed for "cp". You are > > measuring the overhead of SMB share access. Using ftp bypasses all > > this mechanism completely, and sends files directly over the network. > > Try comparing the time it takes to copy the file in Windows Explorer > > to the SMB share and to an FTP location -- you'll probably see the > > same results. > > I was aware that there is SMB overhead - just didn't think it would be > that great! Well, if you compared a cp to a local directory with ftp to localhost, you'd get another datapoint... > (BTW: How exactly do you get the time command working in conjuntion with > a "copy the file in the Windows Explorer"! :-) ) Umm, have people forgotten already about the good ol' "wallclock time"? ;-) Sometimes the old methods are still the best [*]. > > IOW, this is not really Cygwin-related. > > This is true if such large overhead is only attributable to SMB. Well, that's what the experiment is for... Alternatively, compare a non-Cygwin ftp with a "copy" from cmd.exe (although that may skew the comparison a bit if the ftp implementation is not too efficient). Igor [*] Of course, I wouldn't mind at all if someone shows how to programmatically measure time-to-copy in Windows Explorer... -- http://cs.nyu.edu/~pechtcha/ |\ _,,,---,,_ pechtcha AT cs DOT nyu DOT edu ZZZzz /,`.-'`' -. ;-;;,_ igor AT watson DOT ibm DOT com |,4- ) )-,_. ,\ ( `'-' Igor Pechtchanski, Ph.D. '---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow! "I have since come to realize that being between your mentor and his route to the bathroom is a major career booster." -- Patrick Naughton -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/