<< 05-01-2017 >>
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11:17:42dom96cheatfate: your nickname has been changed, and the forum should be faster now
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11:22:45cheatfatedom96, thanks
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12:06:33ArrrrReally fast, what changed to be faster now?
12:07:40dom96Araq optimised the database
12:07:47dom96https://github.com/nim-lang/nimforum/commit/e65168db55a91874abecefc5abb76aaa4a68e365
12:17:17ArrrrIt pays off
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14:27:31hohlerde"faster" is an underestimation
14:54:42tstmYeah, database indices are a thing.
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15:35:36Araqfederico3: what would you use instead?
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15:39:03federico3Araq: it really depends on the use-case. Are you talking about the forum or in general?
15:39:13Araqthe forum.
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15:42:36federico3I don't have metrics from the forum at hand, but often for a simple single-host, single-threaded application with a very small dataset and a simple access pattern (i.e. 99% of the queries are listing contents by thread/page) one option is to keep the dataset in memory serialize it atomically to disk when there's a change
15:47:28Araqeven the "really put this dat on hard disk, it's crucial" step is non trivial.
15:48:21Araq*data
15:48:23euantorif you want to keep it in memory, you might as well choose something purpose written to be fault tolerant such as redis
15:48:41euantorbut a DB is a better choice for forum data in my opinion
15:48:51federico3Araq: you mean doing sync() reliably?
15:48:56Araqyes.
15:49:17Araqsqlite's implementation for this is not trivial iirc
15:49:47federico3and along that line, the idea that memory is "volatile" and data on disk is "persistent" is an oversemplification
15:50:18Araqnot too mention that the serialization format will likely be json or worse.
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15:53:38federico3euantor: we are talking single-host here :)
15:55:38euantorfederico3: For now we are - Nim might have millions of users this time next year ;)
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15:56:17euantorAnd then you don't want to be running a forum for all of those on one host with a hand rolled in memory store with very little testing
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16:08:14SalewskiAraq, inside module tables.nim you do not define your own index operator [] for the table, but you write hundreds of times somethink like
16:08:19Salewskiif isFilled(t.data[h].hcode): yield (t.data[h].key, t.data[h].val)
16:08:33SalewskiIs that for performance reasons?
16:08:52Araqnah, I'm still learning Nim.
16:10:09SalewskiSo you suggest that I shall define [] for my robin hood hash, for internal use also? No performance decrease for inline proc?
16:10:58Araqthese days I might write something like template `!`*(field: untyped): untyped {.dirty.} = t.data[h].field
16:11:18Araqif isFilled(!hcode): yield (!key, !val)
16:12:14SalewskiAnd you used template maxHash(t): untyped = high(t.data)
16:12:28Araqthat's for a different reason.
16:12:29SalewskiWould we use a inline proc for that now?
16:14:14Araqmy rule of thumb is: internal use, use a template, external use, use a proc.
16:15:54Araqand often you can shorten the code further with templates like I tried to show you with my '!' example
16:16:13SalewskiThat is a bit different from stated elsewhere -- I think in manual we have: use proc when possible, then template, and finally macro
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16:17:08SalewskiFor me templates looks a bit unsecure like C macros still...
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16:18:36SalewskiBye -- will try to understand your template example from above, thanks.
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16:33:30SalewskiI still would need a hint for the xxhash: http://forum.nim-lang.org/t/2695 # should I try to avoid using the header pragma, because it would not work with LLVM?
16:33:49Araqoh yeah, wanted to reply
16:34:09SalewskiWould be fine, thanks.
16:34:28Araqin a nutshell, don't use .header and the LLVM backend works with it
16:34:55Araqinstead of .importc, header ensure the data layouts actually match
16:35:22Araqand for procs, use importc, but not .nodecl and not .header
16:37:21SalewskiOK, bye.
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21:33:00dom96Nimble 0.8.0 is out https://github.com/nim-lang/nimble/blob/master/changelog.markdown#080---05012017
21:33:57FromGitter<martinium> @dom96 Good work
21:35:31dom96thanks :)
21:36:13FromGitter<rivasiv> congratulations :)
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22:05:19euantorNice one :)
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22:43:48def-pri-pubHow does one update nimble?
22:49:56euantorI think you can do it via nimble? `nimble update nimble` might do the trick?
22:50:56dom96unfortunately it may not be so easy
22:51:17dom96it depends how you installed Nimble and what version of Nim you have
22:51:34euantorNope, didn't work for me, but I'm not sure I have the nimble bin directory in my path
22:51:35dom96also, it would be `nimble install nimble`
22:51:46euantorYeah, I just ran that myself
22:55:30def-pri-pubI installed nimble from the Nim git repo
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23:12:37dom96What library do you guys recommend for cmd line parsing?
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23:17:12dom96I guess docopt it is
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23:34:00Araqparseopt, the one and only
23:34:54Araqthe only library that understood you don't need much when you have a string case statement in the language :P
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