diff options
Diffstat (limited to 'ext')
| -rw-r--r-- | ext/mro/mro.pm | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/ext/mro/mro.pm b/ext/mro/mro.pm index 249f848f2e..f8c8a5b5cd 100644 --- a/ext/mro/mro.pm +++ b/ext/mro/mro.pm @@ -148,18 +148,6 @@ the given class name, even if the isa relationship is indirect. This is used internally by the MRO code to keep track of method/MRO cache invalidations. -Currently, this list only grows, it never shrinks. This -was a performance consideration (properly tracking and -deleting isarev entries when someone removes an entry -from an C<@ISA> is costly, and it doesn't happen often -anyways). The fact that a class which no longer truly -"isa" this class at runtime remains on the list should be -considered a quirky implementation detail which is subject -to future change. It shouldn't be an issue as long as -you're looking at this list for the same reasons the -core code does: as a performance optimization -over having to search every class in existence. - As with C<mro::get_linear_isa> above, C<UNIVERSAL> is special. C<UNIVERSAL> (and parents') isarev lists do not include every class in existence, even though all classes are @@ -175,10 +163,6 @@ Any class for which this function returns true is "universal" in the sense that all classes potentially inherit methods from it. -For similar reasons to C<isarev> above, this flag is -permanent. Once it is set, it does not go away, even -if the class in question really isn't universal anymore. - =head2 mro::invalidate_all_method_caches() Increments C<PL_sub_generation>, which invalidates method |