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Changes between Initial Version and Version 1 of Ticket #21270, comment 12

initial	v1
1	1	nacin beat me to it. My comment:
2	2
3		Actually, this can cause quite a few extra queries when running without a persistent cache. switch_to_blog() calls wp_cache_init() which obliterates the wp cache instance. With a persistent cache this simply means some extra cache trips to repopulate the local cache after calling restore_current_blog(). nacin and I discussed a softer init that maintains a stack of pointers to existing cache objects.
	3	Actually, this can cause quite a few extra queries when running without a persistent cache. switch_to_blog() calls wp_cache_init() which obliterates the wp cache instance. With a persistent cache this simply means some extra cache trips to repopulate the local cache after calling restore_current_blog(). Without persistence this means db queries to repopulate local cache. nacin and I discussed a softer init that maintains a stack of pointers to existing cache objects.
4	4
5	5	These functions should be deprecated and switch_to_blog()/get_option()/restore_to_blog() should be used instead. This way multiple option calls can be done within one switch_to_blog() instead of switching and restoring for every *_blog_option() call.