[jackmott]

so write a specialized GC for the task in C or C++.

C++ can always win!

JVM has hotspot? use profile guided optmization in C!

There is no escape!

[sgift]

If you are one of the three people in the world that can do it. ;-)

[fauigerzigerk]

Just use an arena allocator (or similar) where appropriate. It's not difficult and it's how C, C++ and Rust win all micro benchmarks that involve memory allocation: http://benchmarksgame.alioth.debian.org/u64q/binarytrees.htm...