Rewriting Old Solaris C Code In Python Yielded A 17x Performance Improvement

[smitty3268]

In case of tight loops it might be better, as you want to keep all of your code inside of the instruction cache. The point is that these optimizations are applicable to all compatible hardware, unlike compiling for specific mircoarchitecture, which will require a specific instruction set that's not the base standard.

There are always going to be edge cases where something is better. However, in general -Os performs worse than -O2 on modern hardware, and I'd argue that's true in 99/100 applications. Maybe more than that. And -O3 is generally beter than -O2, though perhaps not so completely across the board.

My point was that if you're going to argue for a hardware-agnostic optimization flag, -Os is about the last one you want to pick.

[Guest]

There are always going to be edge cases where something is better. However, in general -Os performs worse than -O2 on modern hardware, and I'd argue that's true in 99/100 applications. Maybe more than that. And -O3 is generally beter than -O2, though perhaps not so completely across the board.

My point was that if you're going to argue for a hardware-agnostic optimization flag, -Os is about the last one you want to pick.

-O3 is considered to be unstable for general use, so -O2 it is.

[pal666]

But most code is not linked with --as-needed

time to change your distro then

[pal666]

Implicitly you start at 1, but nothing prevents you from starting in any other positions, or even with a string, because a table is a hash-table..

table is a hash-table, but list interface to it starts counting from 1
you can add element at zero index, but syntax is uglier and ipairs will ignore it while pairs will return it out of order. so you can add ugly zeroth element, but it will not be a list anymore

[pal666]

-O3 is considered to be unstable for general use, so -O2 it is.

fix your consideration

[vladpetric]

time to change your distro then

I'm pretty happy with Clear Linux, for a number of reasons

[pal666]

I'm pretty happy with Clear Linux, for a number of reasons

one of them being superfluous shared library deps?

[vladpetric]

one of them being superfluous shared library deps?

One of the things I learned early in my career is what is worth worrying about and what is not. You can think of it as a variant of Amdahl's law, essentially. So, why should I give a FF about details like that that have no real life impact?

Now, do you just need to have the last word, no matter what?

[pal666]

One of the things I learned early in my career is what is worth worrying about and what is not. You can think of it as a variant of Amdahl's law, essentially. So, why should I give a FF about details like that that have no real life impact?

if you don't understand something, it doesn't necessarily have no real life impact
in any case, you made assertion about software in general, not about your personal toy distro. in real distros for grownups --as-needed is on by default (yep, exactly because it has no real life impact)

Now, do you just need to have the last word, no matter what?

no, but it seems you need it

[vladpetric]

if you don't understand something, it doesn't necessarily have no real life impact
in any case, you made assertion about software in general, not about your personal toy distro. in real distros for grownups --as-needed is on by default (yep, exactly because it has no real life impact)
no, but it seems you need it

My assertion is that the vast majority of the tools in /bin/ and /usr/bin are pure C, as opposed to C++, and ldd is a decent way to figure out which ones. That's it, really. You haven't actually made a real argument to the contrary.

You assertion that Clearlinux (essentially the fastest, lowest overhead distro on x86) is not for grownups is absolutely comical.

There's very little point in talking at this time. If this was facebook I'd use the block button and suggest you do the same.