Re: F37 proposal: Add -fno-omit-frame-pointer to default compilation flags (System-Wide Change proposal)

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On 7/6/22 08:30, Vitaly Zaitsev via devel wrote:
On 05/07/2022 21:15, Matthias Clasen wrote:
And I doubt that you'd be able to notice a 'smaller than 1% slowdown' on your system.

4% slowdown is unacceptable.

At least for Fedora Workstation, being
a useful system for developers with working debugging and profiling tools should have some weight too.

Debugging works well on Fedora without this flag.

I agree that it works well  (at least better than with most competing OSes), but that does not mean it works perfectly and that it's not improvable. I must say that global debugging capabilities have decreased with time since 20 years. More and more, one needs to rely on "debugging by printf" because gdb and similar tools are confused, notably because local variables are "optimsed out" (which I suspect is related to frame pointer). This is a price to pay to better optimisation and performance, but leads to more time spent to find the place of a bug.

So yes it works well, but it could be better.... Now at which cost for the overall community, this is another story.

      Theo.
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