“Sean Gilbertson” prell@cfl.rr.com wrote in message:
I tested out some file downloads to make sure that those would not
freeze anything, and they didnt seem to at all. Do you know of any
other problem areas that I should look out for?
I don’t know if this will apply to you, but on Win 2K, I have this program
using net/ftp:
···
#------------------------------------------------------------
require "net/ftp"
ftp = Net::FTP::new("ftp-srvr")
ftp.login("anonymous","")
a = ftp.dir("*.*")
puts a if $DEBUG
tb = Time::now
ftp.getbinaryfile("Sales.ppt","junk.bin")
ta = Time::now
puts "Ftp get took #{ta-tb} seconds"
tb = Time::now
ftp.putbinaryfile("junk.bin","junk.bin")
ta = Time::now
puts "Ftp put took #{ta-tb} seconds"
puts ftp.status if $DEBUG
ftp.close
#-----------------------------------------------------
Ran it:
C:\atest>ruby -wv tst_ftp1.rb
ruby 1.6.8 (2002-12-24) [i586-mswin32]
Ftp get took 20.248 seconds
Ftp put took 20.809 seconds
Ran it with profiler:
C:\atest>ruby -wv -rprofile tst_ftp1.rb
ruby 1.6.8 (2002-12-24) [i586-mswin32]
Ftp get took 23.703 seconds
Ftp put took 23.132 seconds
% cumulative self self total
time seconds seconds calls ms/call ms/call name
85.22 16.51 16.51 808 20.44 20.44 IO#read
6.97 17.87 1.35 3 450.33 6248.67 Kernel.loop
2.74 18.40 0.53 814 0.65 0.85 Proc#call
1.29 18.65 0.25 3 83.33 123.33 Kernel.require
1.19 18.88 0.23 821 0.28 0.28 IO#write
[snip]
Notice how IO#read took 85% of the time
Then ran the native ftp client:
C:\atest>ftp ftp-srvr
Connected to ftp-srvr.abc.xyz.com.
220 DBM-Team FTP Server
User (ftp-srvr.abc.xyz.com:(none)): anonymous
331 User name okay, please send complete E-mail address as password.
Password:
230 User logged in, proceed.
binary
200 Type set to I.
get Sales.ppt
200 PORT Command successful.
150 Opening BINARY mode data connection for Sales.ppt (1649152 bytes).
226 Transfer complete.
ftp: 1649152 bytes received in 0.26Seconds 6318.59Kbytes/sec.
put junk.bin
200 PORT Command successful.
150 Opening BINARY mode data connection for junk.bin.
226 Transfer complete.
ftp: 1649152 bytes sent in 0.22Seconds 7462.23Kbytes/sec.
quit
221 Goodbye!
C:\atest>
This was almost 100 times faster !
So I tried with Ruby 1.8 :
C:\atest>ruby -wv tst_ftp1.rb
ruby 1.8.0 (2003-03-03) [i386-mswin32]
Ftp get took 0.511 seconds
Ftp put took 0.831 seconds
Great !
But it is still twice as slow …and with the profiler:
C:\atest>ruby -wv -rprofile tst_ftp1.rb
ruby 1.8.0 (2003-03-03) [i386-mswin32]
Ftp get took 1.533 seconds
Ftp put took 1.722 seconds
% cumulative self self total
time seconds seconds calls ms/call ms/call name
52.79 1.33 1.33 3 444.00 644.33 Kernel.loop
9.91 1.58 0.25 808 0.31 0.31 IO#read
8.76 1.80 0.22 821 0.27 0.27 IO#write
5.15 1.93 0.13 842 0.15 0.15 String#==
3.17 2.01 0.08 3 26.67 66.67 Kernel.require
2.38 2.07 0.06 16 3.75 3.75
MonitorMixin.mon_exit
1.98 2.12 0.05 1 50.00 50.00
Profiler__.start_profile
1.98 2.17 0.05 10 5.00 12.00 Net::FTP#voidresp
1.59 2.21 0.04 15 2.67 2.67 IO#readline
1.59 2.25 0.04 16 2.50 3.13
MonitorMixin.mon_enter
1.59 2.29 0.04 16 2.50 164.56
MonitorMixin.synchronize
1.19 2.32 0.03 15 2.00 4.67 Net::FTP#getline
1.19 2.35 0.03 1 30.00 30.00
TCPSocket#initialize
1.19 2.38 0.03 6 5.00 5.00
Module#attr_accessor
0.79 2.40 0.02 15 1.33 8.00 Net::FTP#getresp
0.79 2.42 0.02 15 1.33 6.00
Net::FTP#getmultiline
0.40 2.43 0.01 1 10.00 40.00 Net::FTP#login
[snip]
And this is with a small 1.6MB file. As the file size grows (I tried with
400 MB file)
the difference is staggering.
Something to think about, eh ?
– shanko
possibility that this wouldn’t have solved