>I have a vague memory that using the warnings pramga will make the code >use slightly more memory. It that still true (was it ever) and, if so, >what kind of typical percentage overhead is there? Purely anecdotally. % wc plum 4616 11257 90680 plum First, without warnings: % plum + PID STAT TIME SL RE PAGEIN VSZ RSS LIM TSIZ %CPU %MEM COMMAND 7426 S+ 0:00.52 0 1 0 2816 2984 117428 932 65.0 2.3 /usr/bin/perl /ho Next, without warnings: % plum + PID STAT TIME SL RE PAGEIN VSZ RSS LIM TSIZ %CPU %MEM COMMAND 17513 S+ 0:00.54 0 0 0 2848 3028 117428 932 0.0 2.3 /usr/bin/perl /ho --tomThread Previous