[swift-evolution] What about garbage collection?
davesweeris at mac.com
Tue Feb 9 18:59:36 CST 2016
> from http://www.eetimes.com/document.asp?doc_id=1328682
> "In an NVMe-based solid state drive, XPoint chips can deliver more than 95,000 I/O operations per second at a 9 microsecond latency, compared to 13,400 IOPs and 73 ms latency for flash."
Sent from my iPhone
> On Feb 9, 2016, at 16:47, Craig Cruden via swift-evolution <swift-evolution at swift.org> wrote:
> Much sooner…… Optane (which should dramatically increase the durability) is out this year from Intel, and the competitors plan to have equivalent out in a year I think….
>> On 2016-02-10, at 7:43:40, Goffredo Marocchi via swift-evolution <swift-evolution at swift.org> wrote:
>> I think those changes can be overcome... but yes, it is not something that would happen tomorrow... More like five years from now ;). *Crossing fingers for memristors or some new nonvolatile storage solution to overcome the current flash issue with frequent read/write cycles....*
>> Maybe enough redundancy and better controllers can allow the same flexibility on mobile's that we enjoy on any SSD on laptops and desktops nowadays and similar I/O throughout though.
>> Sent from my iPhone
>>> On 10 Feb 2016, at 00:32, Greg Parker <gparker at apple.com> wrote:
>>>>> On Feb 9, 2016, at 2:21 PM, Goffredo Marocchi via swift-evolution <swift-evolution at swift.org> wrote:
>>>>>> On 9 Feb 2016, at 18:18, Charles Srstka via swift-evolution <swift-evolution at swift.org> wrote:
>>>>>>> On Feb 9, 2016, at 8:35 AM, Jean-Denis Muys via swift-evolution <swift-evolution at swift.org> wrote:
>>>>>>> It’s a long since resolved dispute, and GC won. I don’t want Steve Jobs to reach out from the grave and drag us back to the 70s. There’s nothing special about mobile phones: they are more powerful than the computers that GC won on in the first place.
>>>>> I’d disagree with that, for one rather important reason; the computers that GC won on had virtual memory. On mobile, when your RAM runs out, it’s out. So RAM constraints are somewhat more serious on mobile.
>>>> This will be then more fun when we have page file support as virtual memory is already there.
>>> Unlikely with current hardware technology. NAND storage on mobile devices has limited lifetime based on the number of writes. Adding a swap file would burn through that lifetime awfully fast.
>>> Greg Parker gparker at apple.com Runtime Wrangler
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