[libcxx-commits] [libcxx] [libc++] Specialize unique_ptr for the default deleter (PR #96504)

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zmodem wrote:

> @zmodem Thanks for the info. Would you be able to also provide numbers for #76756? Something in the release notes like "this change resulted in a 5% decrease in debug info size for Chromium" always sounds great.

Sure! Compared to libc++ head, applying that:

- Total .obj file size reduced 5.5%
- chrome.dll.pdb size reduced 5.1%
- The type information size in the PDB reduced 10.6%

Those are very appealing numbers for us :)

These are my local build time measurements:

With head:

```
real    37m23.793s
user    4121m5.728s
sys     408m9.989s
```

With my patch:

```
real    36m47.368s
user    4051m46.384s
sys     401m42.658s
```

With #76756:

```
real    36m4.842s
user    3970m57.689s
sys     398m46.022s
```

Even if these measurements are not scientific, the numbers point in the right direction.

> 
> I hope it's good enough if #76756 lands in ~2 months? 

Yes, that's good for us.

> It would also be great if you could run the patch through its paces within google.

I've asked folks more familiar with the internal processes to take a look.

https://github.com/llvm/llvm-project/pull/96504