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Re: Performance optimization in av::fixup - use buffered IO, not mapped file


On 11/12/2012 8:06 PM, Daniel Colascione wrote:
On 12/10/2012 7:51 PM, Daniel Colascione wrote:
The key to generating a binary that repros the problem is to unexec emacs, then
try to repro with that generated binary, not a copy of it.
The real explanation is a lot simpler: the binary is sparse. When you create a
file mapping object for a sparse file, Windows discards all cached pages for
that file.
!!

Wow. How in the world did you figure that out?

Ryan


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