Commits on Oct 18, 2013

1. Remove jemalloc from the runtime …

   As discovered in rust-lang#9925, it turns out that we weren't using jemalloc on most
   platforms. Additionally, on some platforms we were using it incorrectly and
   mismatching the libc version of malloc with the jemalloc version of malloc.
   
   Additionally, it's not clear that using jemalloc is indeed a large performance
   win in particular situtations. This could be due to building jemalloc
   incorrectly, or possibly due to using jemalloc incorrectly, but it is unclear at
   this time.
   
   Until jemalloc can be confirmed to integrate correctly on all platforms and has
   verifiable large performance wins on platforms as well, it shouldn't be part of
   the default build process. It should still be available for use via the
   LD_PRELOAD trick on various architectures, but using it as the default allocator
   for everything would require guaranteeing that it works in all situtations,
   which it currently doesn't.
   
   Closes rust-lang#9925

   

   alexcrichton committed Oct 18, 2013
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