[LLVMdev] Exception handling slowdown?

[John McCall]

On Jul 7, 2012, at 12:10 AM, Duncan Sands wrote:
> On 07/07/12 02:20, John McCall wrote:
>> On Jul 6, 2012, at 3:48 PM, Bill Wendling wrote:
>>> On Jul 5, 2012, at 1:33 AM, Duncan Sands wrote:
>>>> Hi Bill,
>>>> 
>>>>> Nothing that I'm aware of has changed with EH. Is it possible to bisect the problem?
>>>> 
>>>> I don't see any relevant LLVM changes, so I guess clang C++ compilation slowed
>>>> down due to some clang changes.  I'm not going to investigate this.
>>>> 
>>> Crumbs.
>>> 
>>> John, Do you know of anything that went into clang that could account for EH slowdowns?
>> 
>> Is this Linux?  Is it possibly just Objective-C tests?  There have been several patches about ObjC runtimes recently that affected exceptions.
> 
> yes, it is linux.  While the worst slowdowns were in Objective-C tests, there
> were lots of non-objc slowdowns too (see list in quoted message in Bill's
> earlier email).

In that case, I do not know of anything that would have caused a global
slowdown in exception handling.

John.