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Re: opcode caching / speed-up app

by tobyink (Abbot)
on Sep 14, 2013 at 14:28 UTC ( #1054116=note: print w/replies, xml ) Need Help??


in reply to opcode caching / speed-up app

Given that you say it's an intranet app, I'll assume it's web-based. There's essentially two ways Perl can power a web-based app: via CGI; or via some sort of persistent mechanism (FastCGI, mod_perl, Perl-native web servers).

If you're using a persistent mechanism, a single Perl process (and thus a single compilation phase) serves multiple (potentially millions of) requests. So speeding up the compilation phase serves no purpose at all.

If you're not using a persistent mechanism, then a new Perl process is spawned for every request, which has to parse and compile your script, along with all the modules you're using. In this case an opcode cache would give you some extra performance; however switching to a persistent mechanism would give you a far bigger boost.

use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name

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[1nickt]: Hm well actually I guess it's not the trailing semi-colon that's at issue there, it's disambiguation between the ellipsis and the binary flip-flop
[1nickt]: Although the example given does not produce an error as stated, on my perl.
[1nickt]: perl -wE 'say for map { ... } 1..3;' # "Unimplemented at -e line 1" ... <c>perlsyn says that should throw a syntax error...
[karlgoethebier]: 1nickt: "Edge cases..." Yes, it seems so. Thanks Nick

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