Re: Allocation sinking in git HEAD
- From: David Given <dg@xxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Tue, 03 Jul 2012 23:42:21 +0100
On 03/07/12 13:21, Mike Pall wrote:
[...]
> 140.0 Lua
> 26.9 LuaJIT -O-sink
> 0.20 LuaJIT -O+sink *** 700x faster than Lua ***
Very impressive! Don't suppose you have an equivalent benchmark in C++,
do you?
How does it determine whether the allocation can be sunk or not? How
much work can we do with a new object before the JIT gives up and
allocates it off the heap?
(For example, passing the object to a leaf function vs passing it to a
non-leaf function vs passing it to an FFI function...)
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