Vyukov and others have made some allocation-related changes that went by today in https://twitter.com/golang_cls https://twitter.com/golang_cls (small maps and

Vyukov and others have made some allocation-related changes that went by today in https://twitter.com/golang_cls https://twitter.com/golang_cls (small maps and string-related buffers can now sometimes be stack-allocated, variables captured by closures less often need to be moved to the heap, and some other language constructs that used to allocate now don't). It figures that some stuff wouldn't be approved for 1.5; other changes are going on, and some compromise mostly seems like the cost of the regular release schedule they maintain.