[PATCH] enable double buffering on GtkCanvasPeer

[Tom Tromey]

>>>>> "graydon" == graydon hoare <graydon@redhat.com> writes:

graydon> wait, wait, hold the phone.
graydon> [ ... ]

graydon> In other words, it appears that batching JNI calls doesn't
graydon> buy me a great deal in thie context, perhaps 25 or so
graydon> rectangles / second improvement (~ 5% ?).

If your JNI code can be auto-generated we could also generate CNI
versions.  This is only worth looking at if the native code is pretty
thin and if performance is important here.

Tom