[llvm-dev] RFC: DenseMap grow() slowness

[Owen Anderson via llvm-dev]

> On Mar 15, 2016, at 5:39 PM, Philip Reames <listmail at philipreames.com> wrote:
> 
> 
> 
> On 03/15/2016 05:10 PM, Owen Anderson wrote:
>> 
>>> On Mar 15, 2016, at 4:56 PM, Philip Reames via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
>>> 
>>> Er, LoadValue's been around for a while (6 months).  How far back are you testing?  I'd strongly suggest switching to something more recent.
>> 
>> Some of us have to support internal release branches for non-trivial amounts of time.
> Right, but how does that relate to the code base you're looking at when analyzing performance and proposing changes on ToT?

We try very hard to upstream all improvements we make to LLVM, even if we find them while investigating or debugging older release branches.  We wouldn’t be proposing it if we did not believe it would be of benefit to ToT as well.

—Owen
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