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I have run across a problem in my local network communications, which should be lightning fast. Here is an example:
#!/idcom/bin/perl use IO::Socket::INET; use Time::HiRes qw( gettimeofday tv_interval ); use strict; our $PORT = 9991; if(fork) { my $s = IO::Socket::INET->new( LocalPort => $PORT, Listen => 5, Re +use => 1 ); my $c = $s->accept(); while(<$c>) { print {$c} $_; } } else { sleep 1; my $s = IO::Socket::INET->new( PeerAddr => 'localhost:'.$PORT ); for(1..5) { my $t0 = [gettimeofday]; print {$s} "func=mbs_descriptive&type="; print {$s} "&secid=313627KM2\n"; print ''.<$s>; print tv_interval( $t0, [gettimeofday] ),"\n"; } } OUTPUT func=mbs_descriptive&type=&secid=313627KM2 0.000458 func=mbs_descriptive&type=&secid=313627KM2 0.040329 func=mbs_descriptive&type=&secid=313627KM2 0.040905 func=mbs_descriptive&type=&secid=313627KM2 0.03986 func=mbs_descriptive&type=&secid=313627KM2 0.040938
now if I change the code to use
print {$s} "func=mbs_descriptive&type=&secid=313627KM2\n"; instead of print {$s} "func=mbs_descriptive&type="; print {$s} "&secid=313627KM2\n"; <C> I then get <C> func=mbs_descriptive&type=&secid=313627KM2 0.000448 func=mbs_descriptive&type=&secid=313627KM2 9.3e-05 func=mbs_descriptive&type=&secid=313627KM2 0.000161 func=mbs_descriptive&type=&secid=313627KM2 7.8e-05 func=mbs_descriptive&type=&secid=313627KM2 7.7e-05
A lot of our code kind of piecemeal prints to a socket like this, what is going on, and can I fix it without completely redesigning and existing codebase?

                - Ant
                - Some of my best work - (1 2 3)

In reply to Help me understand/fix buffering issue for tcp? by suaveant

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