On 23/09/2019 08:23, Thomas Monjalon wrote:
> 20/09/2019 09:38, Ray Kinsella:
>>
>> On 19/09/2019 16:16, Bruce Richardson wrote:
>>> On Thu, Sep 19, 2019 at 02:28:04PM +0100, Ray Kinsella wrote:
>>>>
>>>>
>>>> On 19/09/2019 13:35, Andrzej Ostruszka wrote:
>>>>> On 9/18/19 3:32 PM, Ray Kinsella wrote:
>>>> ...>
>>>>> Compilation time is much longer. In a normal hack|fix/compile/repeat
>>>>> cycle with "compile" part being simple "make" the link time might be a
>>>>> bit annoying. So I imagine keeping LTO off for the most part of the dev
>>>>> cycle and then at the end when doing release/cleanup turn LTO on - to
>>>>> either get release build ready or to get some set of warnings that you
>>>>> address before yet another attempt to release build.
>>>>
>>>> Well look, I would say a few things.
>>>>
>>>> 1. I see build times going down dramatically with Meson/Ninja in any case.
>>>
>>> In the general case yes, but mainly it helps if you have a large number of
>>> cores. For anyone building in a CI with only a couple of cores, meson+ninja
>>> isn't going to help much.
>>>
>>> /Bruce
>>>
>>
>> Very true, and I completely acknowledge that LTO adds compilation time.
>> I would just like to see it in or out, not another build time option.
>
> Please can we get some numbers to understand how longer it is?
>
I will note here, that it will always be a function of the number of
object files involved. We should measure it now to understand ...
