== Quote from Sean Kelly (s...@invisibleduck.org)'s article > On Mar 17, 2011, at 11:56 PM, Don wrote: > > dsimcha wrote: > >> I've accumulated a bunch of little libraries via various evening and > weekend > >> hacking projects over the past year or so, in various states of > completion. > >> Most are things I'm at least half-considering for Phobos, though some > belong > >> as third-party libs. I definitely don't have time to finish/flesh > out all of > >> them anytime soon, so I've decided to ask the community what to > prioritize. > >> Below is a summary of everything I've been working on, with its > current level > >> of completion. Please let me know the following: > > > >> 3. TempAlloc: A memory allocator based on a thread-local segmented > stack, > >> useful for allocating large temporary buffers in things like numerics > code. > >> Also comes with a hash table, hash set and AVL tree optimized for > this > >> allocation scheme. The advantages over plain old stack allocation > are that > >> it's independent of function calls (meaning you can return pointers > to > >> TempAlloc-allocated memory from a function, etc.) and it's segmented, > meaning > >> you can allocate huge buffers w/o risking stack overflow. Its main > weakness > >> is that this stack is not scanned by the GC, meaning that you can't > store the > >> only reference to a GC-allocated piece of memory here. However, in > practice > >> large arrays of primitives are an extremely common case in > >> performance-critical code. I find this module immensely useful in > dstats and > >> Lars Kyllingstad uses it in SciD. Getting it into Phobos would make > it easy > >> for other scientific/numerics code to use it. Completion state: > Working and > >> used. Needs a litte cleanup and documentation. (Phobos candidate) > > > > This is #1. Far and away. Belongs in druntime. > Stuff like this is why core.memory isn't called core.gc.
BTW, the TempAlloc module also includes a hash table, hash set and AVL tree that are specifically optimized for TempAlloc. Should these be included in the submission? The disadvantages I see here is that they are less generally useful (possibly too high level for druntime) and that they will make the review take a heck of a lot longer.
