round robin object alloc affects snap effiiency

[GoogleCodeExporter]

make object allocator to reuse released objects, not to allocate from free 
space all the time

Original issue reported on code.google.com by [email protected] on 19 Sep 2011 at 1:07

[GoogleCodeExporter]

Original comment by [email protected] on 9 Oct 2011 at 8:56

• Added labels: Milestone-Release1.0

[GoogleCodeExporter]

Original comment by [email protected] on 11 Oct 2011 at 8:51

• Added labels: Milestone-Release1.5

[dzavalishin]

Use some object hdr field (satellites?) as link to next free object in this arena.

• improve object mem reuse and less snapshot footprint
• improve allocation speed

[dzavalishin]

have few queues of last freed objects:

• int
• stack frame
• small

others - do from usual arenas alloc