PGO not only for own code but for D runtime & Phobos too?

[Arun Chandrasekaran]

On Thursday, 3 October 2019 at 16:01:19 UTC, Jon Degenhardt wrote:
> On Thursday, 3 October 2019 at 15:15:44 UTC, Robert M. Münch 
> wrote:
>> Did anyone already try to use PGO with his own code and for 
>> the D runtime and phobos?
>>
>> Any indication how big the performance difference is when the 
>> D runtime and Phobos is compiled using PGO?
>
> I did a study of LTO and PGO on the combined application and 
> libraries (druntime & phobos). It's available here: 
> https://github.com/eBay/tsv-utils/blob/master/docs/lto-pgo-study.md.
>
> For the apps tested it's a big win to include druntime and 
> phobos in the LTO/PGO target. PGO makes a difference 
> standalone, though I didn't try to separate the app code from 
> the druntime/phobos code.
>
> --Jon

A very interesting and entertaining talk on measuring performance 
https://www.youtube.com/watch?v=r&feature=youtu.be-TLSBdHe1A

I thought only Andrei can make tech talk hilarious and 
interesting at the same time. This one exceeded my expectations.