stop zeroing exchange heap allocations and some other more minor allocations#4938
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bors merged 5 commits intorust-lang:incomingfrom Feb 15, 2013
thestinger:no_zero
Merged
stop zeroing exchange heap allocations and some other more minor allocations#4938bors merged 5 commits intorust-lang:incomingfrom thestinger:no_zero
bors merged 5 commits intorust-lang:incomingfrom
thestinger:no_zero
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this isn't actually calloc - it calls the malloc wrapper which no longer zeroes
it doesn't actually call calloc, so it's fairly pointless
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Awesome. I love seeing bits of rt evaporate. |
bors
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I removed the unused wrappers methods named `calloc` because they relied on the malloc wrapper having a `bool zero = true` default parameter (which resulted in some accidental zeroing). Perhaps wrapping the actual calloc function would be useful, but I don't know of an existing use case that could use it so I just removed these. This gives an ~1% performance improvement for TreeMap, which does a lot of small allocations. Vectors use `realloc` which didn't zero before these changes so there's no measurable change in performance.
RalfJung
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…ocking Add support for non-blocking TCP sockets and operations
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I removed the unused wrappers methods named
callocbecause they relied on the malloc wrapper having abool zero = truedefault parameter (which resulted in some accidental zeroing). Perhaps wrapping the actual calloc function would be useful, but I don't know of an existing use case that could use it so I just removed these.This gives an ~1% performance improvement for TreeMap, which does a lot of small allocations. Vectors use
reallocwhich didn't zero before these changes so there's no measurable change in performance.