Commits on Jul 24, 2015

1. canvas: Move to shared memory for images and canvas backing stores. …

   The idea here is to land this before making images and canvas IPC-safe,
   because this will shake out bugs relating to the shared memory. There
   are currently test timeouts that are preventing multiprocess images and
   canvas from landing, and I believe those are due to the inefficiency of
   sending large amounts of data in the unoptimized builds we test with. By
   moving to shared memory, this should drastically reduce the number of
   copies and `serde` serialization.
   
   Under the hood, this uses Mach OOL messages on Mac and temporary
   memory-mapped files on Linux.

   

   pcwalton committed Jul 24, 2015

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