Front page | perl.perl6.language |
Postings from June 2001
Simon Cozens wrote: > Please don't try defending "it" or "$^d" in terms of efficiency; > any variable that Perl has to keep track of magically takes a > performance hit. Remember $`, $', and $&? No, this datum is already known by defined() and exists() all I am suggesting is a name for the Perl API name for it. Well, it isn't currently in 5.6.1's bool Perl_hv_exists(pTHX_ HV *hv, const char *key, U32 klen) function (contrary to what John Porter said) but adding it, as extended defined/exists that Only Gets Called When It Immediately And Obviously Precedes Use Of The Magic Variable, would save the later lookups. This is a "Little thing that can just be thrown in" and is nothing more than that. Making $', $`, and $& lexically scoped too could solve their performance hit issues too. They're convenient.Thread Previous | Thread Next