Re: quick question on modules

[LanX]

in reply to quick question on modules

Normally no!

Use means that a module-function import() is called at BEGIN-time.

Normally this function is inherited by Exporter module and does only an aliasing of imported functions.

And aliasing costs only some bytes, not enough to be discussed.

But a module author can chose to define his own import and do whatever he wants... so no general answer here.

[Corion]

A great counterexample is POSIX:

Q:\>perl -MPOSIX -wle "print for grep {$_ =~ /$$/} `tasklist`"
perl.exe                    5508 Console                 0      3.936 
+K


Q:\>perl -MPOSIX=strftime -wle "print for grep {$_ =~ /$$/} `tasklist`
+"
perl.exe                    4904 Console                 0      3.672 
+K

POSIX.pm exports all its functions and constants by default, which costs 300K memory, while importing just the few needed functions reduces the amount of memory spent.

tl; dr - just like you said, no general answer here.