On Mon, 18 Nov 2013 07:48:27 -0800 Guido van Rossum <guido@python.org> wrote:
On Mon, Nov 18, 2013 at 3:28 AM, Serhiy Storchaka <storchaka@gmail.com>wrote:
18.11.13 07:53, Tim Peters написав(ла):
- Some easy sanity checking due to the tiny redundancy (if the byte
immediately following the current frame is not a FRAME opcode, the pickle is corrupt; and also corrupt if a FRAME opcode is encountered _inside_ the current frame).
For efficient unpickling a FRAME opcode followed by 8-byte count should be *last* thing in a frame (unless it is a last frame).
I don't understand that.
Clearly the framing is the weakest point of the PEP (== elicits the most bikeshedding). I am also unsure about the value of framing when pickles are written to strings.
It hasn't much value in that case, but the cost is also small (8 bytes every 64KB, roughly). Regards Antoine.