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#110896 - 09/28/17 08:44 PM Re: Can't compile latest MAME? READ THIS THREAD [Re: Just Desserts]  
Joined: Jan 2012
Posts: 809
rfka01 Offline
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rfka01  Offline
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Joined: Jan 2012
Posts: 809
Bavaria
Bit of a head scratcher here, this is on an i7-4790K (four physical cores), 16GB and a dedicated fast SSD, on Windows 10

MAME compilation for some time has become very slow, over 1h for a SUBTARGET=MESS build with -j9

The build environment is MSYS64 from the current tools. If you look at the statistics for the eight virtual cores, they're all busy but maybe at 10-20% maximum.

Now I have kept an old set of build tools that was manually updated from the 2016 archive ... I tried that today, and all virtual cores are at roughly 90%, the same build is done in just over 20min.

What's happening here?


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#110897 - 09/28/17 08:47 PM Re: Can't compile latest MAME? READ THIS THREAD [Re: Just Desserts]  
Joined: May 2004
Posts: 1,403
Haze Offline
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Haze  Offline
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Joined: May 2004
Posts: 1,403
unrelated, but I don't recommend using an SSD drive for compilation, you'll smash the write limit on them very quickly and end up with a dead SSD, compiling is very I/O intensive.


Last edited by Haze; 09/28/17 08:47 PM.
#110909 - 09/29/17 08:38 AM Re: Can't compile latest MAME? READ THIS THREAD [Re: Just Desserts]  
Joined: May 2004
Posts: 837
Duke Offline
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Duke  Offline
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Joined: May 2004
Posts: 837
Germany
That might have been true for very old SSDs, but it's really a non-issue now. Even the cheap ones support writing terabytes of data. I don't even have a traditional HDD in my system anymore.

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