Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Re: Will Perl 6 optimize away useless assignments?

by RhetTbull (Curate)
on Sep 03, 2001 at 21:01 UTC ( #109896=note: print w/replies, xml ) Need Help??


in reply to Will Perl 6 optimize away useless assignments?

A problem I see with this is that it's hard for the compiler to know what's a "useless" assignment -- especially with a language as extensible as perl. For example, what if the variable is tied? An assignment that looks useless may do quite a bit. Of course, you could tell the compiler "optimize it away unless it's tied" but there may be other examples where it's hard/impossible to tell. Although I doubt anyone uses perl for embedded work, this sort of thing is definitely an issue for C where a variable might really be a hardware register so an assignment isn't useless at all and is probably necessary. Can anyone think of a perl example other than a tied variable?
  • Comment on Re: Will Perl 6 optimize away useless assignments?

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://109896]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (5)
As of 2017-03-26 00:44 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Should Pluto Get Its Planethood Back?



    Results (313 votes). Check out past polls.