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gap-packages / ace

GAP interface for the the Advanced Coset Enumerator (ACE)
https://gap-packages.github.io/ace/
MIT License
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increase the default workspace to 10^8 #12

Closed dimpase closed 6 years ago

dimpase commented 7 years ago

20 years ago 10^6 (4 Megabytes) was a meaningful workspace setting, nowadays even a mobile phone can easily take 10^7 or 10^8.

fingolfin commented 6 years ago

10^8 amounts to 400 MB on a 32bit system, and 800 MB on a 64bit system. While it'd be fine for me, I wonder

@gregg0 what do you think? I already looked into making the change, it's easy enough. Only question s what value you to use: 10^8, or 10^7, or anything in between (e.g. 2^24, for about 128 MB on a 64 bit system; or 2^25 for 256 MB) ...

gregg0 commented 6 years ago

Dear Max

I think you're right ... the default should be increased.

The current default made sense 15-20 years ago, when RAM and diskspace was measured in MB.

Now we measure in GB, and nearly TB.

So the default ought to be at least 10^8.

The question of decimal or binary is only an issue if one departs from 10 powers being a multiple

of 3, and 2 powers being a multiple of 10.

i.e. 10^3 approx= 2^10

Is making the default 10^9 too much?

Regards,

Greg

From: Max Horn notifications@github.com Sent: 20 March 2018 06:51:55 To: gap-packages/ace Cc: Gregory Gamble; Mention Subject: Re: [gap-packages/ace] increase the default workspace to 10^8 (#12)

10^8 amounts to 400 MB on a 32bit system, and 800 MB on a 64bit system. While it'd be fine for me, I wonder

@gregg0https://github.com/gregg0 what do you think? I already looked into making the change, it's easy enough. Only question s what value you to use: 10^8, or 10^7, or anything in between (e.g. 2^24, for about 128 MB on a 64 bit system; or 2^25 for 256 MB) ...

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/gap-packages/ace/issues/12#issuecomment-374411960, or mute the threadhttps://github.com/notifications/unsubscribe-auth/AFUCELhs77kqutvhHc7UfCJojWWFsCWMks5tgDaLgaJpZM4M_nzg.

fingolfin commented 6 years ago

I went with 10^8 for now -- going to 10^9 would have meant a default workspace size of 8 GB, which may be a bit much for some people with not that powerful hardware. But of course we can revisit this and increase it again another day.