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imbruxo
n00b
Joined: 23 Mar 2024
Posts: 17
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 Posted: Sat Nov 02, 2024 3:12 pm Post subject: Do you use ccache in portage ?? |
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so I have this question that is it worth it to use ccache in portage as 2024 ?
any body can give their Idea and details ???
cause somebody tell that is a good thing
somebody tell me it's wast of space and time
but I myself have no Idea about it , and just using system without it
thanks for you attention <3 |
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pietinger
Moderator
Joined: 17 Oct 2006
Posts: 5254
Location: Bavaria
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| Posted: Sat Nov 02, 2024 3:48 pm Post subject: Re: Do you use ccache in portage ?? |
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| imbruxo wrote: | so I have this question that is it worth it to use ccache in portage as 2024 ?
any body can give their Idea and details ??? [...] |
First of all: If you are using our binary packages then you dont need it.
I dont use our binpackages and compile everything ... but ... I do my updates in the night (when I sleep) and dont care if it takes one hour or one hour and 20 minutes 
Maybe read our wiki article - here you will find typically useful reasons to use it: https://wiki.gentoo.org/wiki/Ccache
... and no, I dont use/need it. 
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stefantalpalaru
Tux's lil' helper
Joined: 11 Jan 2009
Posts: 76
Location: Italy
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| Posted: Sat Nov 02, 2024 4:55 pm Post subject: Re: Do you use ccache in portage ?? |
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| imbruxo wrote: | | somebody tell me it's wast of space and time |
That's about right. The average Gentoo user will not benefit from ccache. Further more, it introduces a new class of build-time failure scenarios that you are left debugging by yourself.
Not worth the trouble. |
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logrusx
Advocate
Joined: 22 Feb 2018
Posts: 2528
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| Posted: Sat Nov 02, 2024 6:56 pm Post subject: Re: Do you use ccache in portage ?? |
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| stefantalpalaru wrote: | | imbruxo wrote: | | somebody tell me it's wast of space and time |
That's about right. The average Gentoo user will not benefit from ccache. |
That's about wrong. See this post.
| stefantalpalaru wrote: | Further more, it introduces a new class of build-time failure scenarios that you are left debugging by yourself.
Not worth the trouble. |
I've had only a few failures related to that during my 4 year odyssey with my old hardware.
However with my current hardware it doesn't make much sense.
Best Regards,
Georgi |
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ChrisJumper
Advocate
Joined: 12 Mar 2005
Posts: 2400
Location: Germany
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| Posted: Sat Nov 02, 2024 9:10 pm Post subject: |
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hi imbruxo,
you need it if you have in some packages the same binary to recompile. If one Package have some same dependencies and will compile the same binary file. Then ccache will push the answer sonner too it.
It is not easy to answer when its useful. But on gentoo its likely. because you have many packages that do not change. Since updates often change just few of sounds lines of code. However you have many libraries with chances and .. so on. If a sub library chance your upper code with that dependence will change too. But still ccache will boost everything which did not change. |
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imbruxo
n00b
Joined: 23 Mar 2024
Posts: 17
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| Posted: Thu Nov 07, 2024 12:11 pm Post subject: Re: Do you use ccache in portage ?? |
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| pietinger wrote: | | imbruxo wrote: | so I have this question that is it worth it to use ccache in portage as 2024 ?
any body can give their Idea and details ??? [...] |
First of all: If you are using our binary packages then you dont need it.
I dont use our binpackages and compile everything ... but ... I do my updates in the night (when I sleep) and dont care if it takes one hour or one hour and 20 minutes
Maybe read our wiki article - here you will find typically useful reasons to use it: https://wiki.gentoo.org/wiki/Ccache
... and no, I dont use/need it. |
Thanks my friend  |
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imbruxo
n00b
Joined: 23 Mar 2024
Posts: 17
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| Posted: Sat Nov 09, 2024 6:43 pm Post subject: |
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| ChrisJumper wrote: | hi imbruxo,
you need it if you have in some packages the same binary to recompile. If one Package have some same dependencies and will compile the same binary file. Then ccache will push the answer sonner too it.
It is not easy to answer when its useful. But on gentoo its likely. because you have many packages that do not change. Since updates often change just few of sounds lines of code. However you have many libraries with chances and .. so on. If a sub library chance your upper code with that dependence will change too. But still ccache will boost everything which did not change. |
Thanks for your info
I'm really grateful for it |
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logrusx
Advocate
Joined: 22 Feb 2018
Posts: 2528
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| Posted: Sat Nov 09, 2024 7:11 pm Post subject: |
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| ChrisJumper wrote: | hi imbruxo,
you need it if you have in some packages the same binary to recompile. If one Package have some same dependencies and will compile the same binary file. Then ccache will push the answer sonner too it.
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Just by itself it's useless for the simple fact by default it includes the path in the hash and portage always includes the version in the path effectively invalidating the cache unless you recompile exactly the same version. Check the post I've linked above.
Best Regards,
Georgi |
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flexibeast
Guru
Joined: 04 Apr 2022
Posts: 473
Location: Naarm/Melbourne, Australia
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| Posted: Sun Nov 10, 2024 9:36 am Post subject: |
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| logrusx wrote: | | unless you recompile exactly the same version |
This is the context in which i've used it in the past: when i was first using Gentoo, it was on a relatively memory-constrained system (12G total), and i was trying to work out appropriate values of MAKEOPTS for packages that take a while to build. Using ccache (and sccache in the case of FF) meant that i could test out values for a given build, knowing that if it bailed in the middle due to memory pressure, the things that had been built prior to that point wouldn't need to built again.
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eschwartz
Developer
Joined: 29 Oct 2023
Posts: 240
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| Posted: Sun Nov 10, 2024 10:02 am Post subject: |
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| sccache is quite horrible about having the full path in the cache key without any choice. ccache works fairly well however, as long as you configure it in the documented manner. |
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