tbaeder added a comment.

In D151300#4367943 <https://reviews.llvm.org/D151300#4367943>, @aaron.ballman 
wrote:

> In D151300#4367939 <https://reviews.llvm.org/D151300#4367939>, @tbaeder wrote:
>
>> In D151300#4367884 <https://reviews.llvm.org/D151300#4367884>, 
>> @aaron.ballman wrote:
>>
>>> LGTM, but it's worth noting that `std::string::pop_back()` calls `erase()` 
>>> and there's no guarantee that there's not an extra allocation involved as a 
>>> result. However, I've not seen evidence that STLs actually do an allocation 
>>> (looking at libc++ and MSVC STL, they don't appear to allocate), so I think 
>>> this is fine.
>>
>> Is the allocation only relevant for performance reasons or something else?
>
> Performance was my only concern there.

Okay, good. I don't think that's too bad since the common line of code has 
exactly 0 trailing null bytes anyway.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151300/new/

https://reviews.llvm.org/D151300

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