On Jan 8, 2014, at 5:19 PM, Dane Trethowan wrote:
One of the things the Power Saver does is to compress memory on the fly when memory starts getting low thus providing more memory for other applications.
This is a terrible idea. This was tried many years ago in the dos era, and it failed miserably. I expect it will do the same here. IMO, compressing data in memory is *not* the way to go. most unix oses already swap out unused programs, which is sometimes why when you switch back to a program you've not been using for a while, it takes a short time before it comes up, because it needs to swap the program back into memory before it can run. This truly is the best way to handle memory management. It's a proven and reliable technology, and has been used for almost as many years as unix has been around. Compressing existing memory is just asking for trouble, because of the multiple methods of accessing memory, if a program asks for a segment of memory that is compressed, and it doesn't ask in a way the compressor understands, then it's going to fail fantastically, and nobody's going to be able to figure out why (for a while at least). These sorts of things are what make neat ideas on paper, but have horrible results in practice. If it works for you, be happy, but I'd not expect it to work all the time for everything, and eventually, one of those times it isn't going to work is when you'll need it the most *not* to fail. I'd personally stay away from this feature, but that's just me. I'm sure apple tested this feature, and feel it's ready for primetime use, but when I manage to upgrade to mavericks, That's one feature I won't be activating.
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