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2020-10-03 13:39:17 × benwr___ quits (sid372383@gateway/web/irccloud.com/x-pbrsmtxwohmjfqbb) (Ping timeout: 260 seconds)
2020-10-03 13:39:24 × sagax quits (~sagax_nb@213.138.71.146) (Read error: Connection reset by peer)
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2020-10-03 13:56:20 <ski> siraben : they are a form of dynamic scoping, i'd say
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2020-10-03 14:09:17 <p0a> maerwald: about the 300 module monolith, isn't a 'solution' to get faster hardware?
2020-10-03 14:09:39 × da39a3ee5e6b4b0d quits (~textual@n11211935170.netvigator.com) (Quit: My MacBook has gone to sleep. ZZZzzz…)
2020-10-03 14:09:40 × rusua_ quits (uid124537@gateway/web/irccloud.com/x-mexpuwrluhhqoukw) (Client Quit)
2020-10-03 14:09:53 <maerwald> p0a: no, because GHC isn't good at compiling in parallel :)
2020-10-03 14:10:06 <maerwald> and if you do, you need 64GB of ram
2020-10-03 14:10:13 → rusua_ joins (uid124537@gateway/web/irccloud.com/x-rvpnrgylngbccoaw)
2020-10-03 14:10:16 <p0a> If you do what?
2020-10-03 14:10:19 <maerwald> (and that's what our amazon instance was, which is quite expensive)
2020-10-03 14:10:43 <maerwald> if you do compile modules in parallel
2020-10-03 14:11:48 <p0a> It's surprising to me that ghc doesn't scale with cores
2020-10-03 14:12:00 <yushyin> yeah, I often do -j1 or -j2 otherwise my 8GB notebook would go OOM while compiling haskell stuff :/
2020-10-03 14:12:02 <kuribas> ghc is quite imperatively written
2020-10-03 14:12:06 <kuribas> AFAIK
2020-10-03 14:12:31 <p0a> 64GB isn't that expensive for a personal build right? we're talking servers -- that's what's expensive
2020-10-03 14:12:46 <maerwald> you need to build on servers too, yeah :)
2020-10-03 14:13:04 × aarvar quits (~foewfoiew@50.35.43.33) (Ping timeout: 246 seconds)
2020-10-03 14:13:08 <kuribas> maerwald: can't you modularize your code more?
2020-10-03 14:13:13 <maerwald> slow CI iterations decrease productivity
2020-10-03 14:13:16 <kuribas> 64GB seems excessive
2020-10-03 14:13:36 × mahene quits (~mahene@2a02:8109:86c0:8d68:5400:2bfd:d746:732c) (Remote host closed the connection)
2020-10-03 14:13:38 <kuribas> maerwald: does it takes hours to compile?
2020-10-03 14:13:54 <kuribas> I find 5 or 10 minutes still acceptable for a CI build
2020-10-03 14:14:13 <maerwald> kuribas: CI was 30 minutes minimum
2020-10-03 14:14:36 <dminuoso> For what its worth, with -O0 you can usually get much better memory and CPU usage.
2020-10-03 14:14:42 <maerwald> currently, they are 1h+
2020-10-03 14:14:54 <dminuoso> For develop iterations, -O0 should be fine for many cases
2020-10-03 14:15:22 <dminuoso> Even in CI you could do that, as long as you switch to the desired optimization level for actual releases.
2020-10-03 14:15:26 <maerwald> dminuoso: then spinning up the event sourced backend would take 2 hours xD
2020-10-03 14:17:00 <p0a> 2 hours means that with 256GB of ram it'd be just 30 minutes maerwald
2020-10-03 14:17:01 × Rudd0 quits (~Rudd0@185.189.115.98) (Ping timeout: 265 seconds)
2020-10-03 14:17:04 <p0a> see? it's fine
2020-10-03 14:17:27 hackage derive-lifted-instances 0.2.1 - Derive class instances though various kinds of lifting https://hackage.haskell.org/package/derive-lifted-instances-0.2.1 (SjoerdVisscher)
2020-10-03 14:18:01 <kuribas> maerwald: what do you do that's so heavy? Lots of generics?
2020-10-03 14:18:28 hackage text-show-instances 3.8.4 - Additional instances for text-show https://hackage.haskell.org/package/text-show-instances-3.8.4 (ryanglscott)
2020-10-03 14:18:54 <maerwald> kuribas: TH, generics, aeson, aeson-typescript
2020-10-03 14:19:35 <kuribas> maerwald: you could try replace some of the generics with TH, that may decrease compile times.
2020-10-03 14:20:05 <maerwald> I don't think that buys much. The problem is rather that it's 300 modules
2020-10-03 14:20:06 <kuribas> maerwald: for example Aeson deriving.
2020-10-03 14:20:13 <maerwald> and I don't work on that project anymore
2020-10-03 14:20:31 <kuribas> maerwald: do you need to compile everything from scratch everytime?
2020-10-03 14:20:36 <p0a> 300 modules means what exactly? 300 invocations of ghc?
2020-10-03 14:20:39 <maerwald> nope
2020-10-03 14:21:11 → heatsink joins (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net)
2020-10-03 14:24:57 hackage exp-pairs 0.2.1.0 - Linear programming over exponent pairs https://hackage.haskell.org/package/exp-pairs-0.2.1.0 (Bodigrim)
2020-10-03 14:25:49 × heatsink quits (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 256 seconds)
2020-10-03 14:28:59 × p0a quits (~user@unaffiliated/p0a) (Quit: bye)
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2020-10-03 15:05:28 hackage atomic-primops 0.8.4 - A safe approach to CAS and other atomic ops in Haskell. https://hackage.haskell.org/package/atomic-primops-0.8.4 (ryanglscott)
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