[mrtg] Re: OT: perl vs shell cmd

Takumi Yamane yamtak at b-session.com
Tue Jun 14 10:15:27 MEST 2005

On Tue, 14 Jun 2005 15:09:47 +0700, Beast wrote 
in <42AE90CB.2080708 at i6x.org>:
> Supose I want to parse a big log file (~500MB/4mil lines), which one
>  is faster and use less memory:
> $ ./parser.pl logfile.log
> $ grep 'Jun 14 03:' | ./parser.pl

IMHO, perl('s regex engine) alone is faster and use less memory.

> if(/^$in_time/) {

It's much better to use 'o' switch, like:
  if(/^$in_time/o) {

Takumi Yamane <yamtak at b-session.com>

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