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2016-08-10T17:05:41Z scymtym: our MAKE-INSTANCE compiler-macro may be leaking something. compiling a file containing lots of (eval-when (:load-toplevel :execute) … (make-instance <static-name-of-a-particular-class> <static-initargs>)) seems to get progressively slower with each compilation. compilation takes 30 seconds after a few compilations whereas compilation with (notinline make-instance) takes 80 ms
2016-08-10T17:06:49Z scymtym will try to investigate when child sleeps
2016-08-10T17:16:09Z scymtym: initial experiment: paste.lisp.org/display/322693
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2016-08-10T17:37:26Z Guest45959: scymtym: what are the odds we just have a really bad hash function for `info` (:
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2016-08-10T17:43:38Z pkhuong: scymtym: globaldb-sxhashoid craps out after 10 items in a list
2016-08-10T17:44:32Z pkhuong: if you have more than 7 static initargs, you'll reach that limit
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2016-08-10T19:53:16Z blackwolf: I'm trying to do an install from scratch using the binary sbcl distribution, but I'm getting the `can't find core file' error.  I'm installing with: `SBCL_HOME=$HOME/lib/sbcl INSTALL_ROOT=$HOME sh install.sh' and sbcl is still looking in /usr/local/lib/sbcl/.  It's been too long since I did a fresh install - what am I missing?
2016-08-10T19:54:57Z joshe: SBCL_HOME is needed at runtime, not install-time
2016-08-10T19:55:12Z joshe: or build with --prefix
2016-08-10T19:56:05Z joshe: I usually write a little wrapper script which sets it and then execs sbcl
2016-08-10T19:56:55Z blackwolf: I'm going off <https://sourceforge.net/p/sbcl/mailman/message/20590383/>.  I also have tried setting --prefix at build time, same issue.
2016-08-10T19:59:05Z joshe: perhaps a mailing list post from 8 years ago (which features someone telling an sbcl developer they're wrong) might not be the best source of information
2016-08-10T19:59:06Z blackwolf: ah - checked gentoo's ebuild.  they hack src/runtime/runtime.c.  now I remember, that's what I did before.
2016-08-10T19:59:39Z joshe: oh, well good luck then
2016-08-10T19:59:52Z stassats: --prefix at build time does work
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2016-08-10T20:09:56Z stassats: scymtym: (eval-when (:load-toplevel :execute)) is just (progn)
2016-08-10T20:51:49Z scymtym: stassats: yeah, thanks. i didn't even think about it. just dumped what i had and went afk
2016-08-10T21:02:26Z scymtym: pkhuong: i would expect a bad hash function to make the ctor caching slow but it seems as if "the same" constructors are generated and cached over and over. wouldn't that indicate a failure of the test function or genuinely unEQUAL keys rather than a failure of the hash function?
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2016-08-10T21:06:56Z stassats:   269 lambdas converted?
2016-08-10T21:08:19Z stassats: are the make-instances not at the top level?
2016-08-10T21:08:26Z stassats: is there something besides?
2016-08-10T21:11:38Z scymtym: i can try to reduce this into a sensible test case so you don't waste your time. fwiw, an example of the expansion i suspect to be causing this is in http://paste.lisp.org/display/322693#2
2016-08-10T21:12:32Z scymtym: each COMPILE-FILE adds a few hundred entries like ((SB-PCL::CTOR ESRAP:RULE T :EXPRESSION #:LIST-INITARG-0 :GUARD-EXPRESSION
2016-08-10T21:12:33Z scymtym:   #:LIST-INITARG-1 :TRANSFORM SB-PCL::|.P2.| :AROUND #:LIST-INITARG-2 :CONDITION T) #(1851459 (5) :DEFINED :FUNCTION)) to globaldb
2016-08-10T21:12:43Z scymtym: that's where my suspicion comes from
2016-08-10T21:13:37Z stassats: each (SB-PCL::ENSURE-CTOR ..) does grow in time
2016-08-10T21:14:16Z scymtym: even when recompiling the same code?
2016-08-10T21:14:24Z stassats: not compiling anything
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2016-08-10T21:17:10Z stassats: so, that name is EQ tested, not EQUAL
2016-08-10T21:18:04Z stassats: due to uniterned symbols?
2016-08-10T21:19:14Z scymtym: that's what i though. could be the LIST-INITARGS- ones in this example
2016-08-10T21:19:58Z stassats: i didn't wonder too much into that territory when i translated the make-instance cm for allocate-instance
2016-08-10T21:20:13Z stassats: (just made them for allocate-instance without any intargs)
2016-08-10T21:21:41Z scymtym: so, instead of GENSYM, a cache i -> (make-symbol (format nil "LIST-INITARG-~D" i))?
2016-08-10T21:22:07Z stassats: why list-initarg at all?
2016-08-10T21:22:39Z stassats: (make-instance 'foo :a 10 :b x) does not have list-initarg for X
2016-08-10T21:23:49Z scymtym: there is a comment in SB-PCL:MAKE-CTOR-FUNCTION-NAME
2016-08-10T21:24:02Z stassats: 3eed77547e03a57c9be57db74081ee0f39ed0fa6 is more insightful
2016-08-10T21:25:26Z stassats: so, i don't think the argument actually does matter, it should do the same as for non constants
2016-08-10T21:26:40Z stassats: won't deal with it today, you may have a go at it
2016-08-10T21:29:04Z stassats: any reason to deal with constants specially at all?
2016-08-10T21:29:29Z stassats: what's the benefit? more compact code for calling the ctor? less polluted constants?
2016-08-10T21:29:37Z scymtym: ok. first, i will have to understand why initarg /values/ are entered into the key at all
2016-08-10T21:29:39Z scymtym: brb
2016-08-10T21:35:51Z stassats: well, i guess if you already support constant inclusion, no reason to throw it away
2016-08-10T21:35:59Z stassats: just need to throw out the list stuff
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2016-08-10T22:40:10Z pkhuong: oh yeah... the comment says it tries to make sure names are EQUALy, but then proceeds to gensym :|
2016-08-10T22:41:14Z stassats: pkhuong: the problem is rather if you have :x '(1 2 3) and :x '(1 2 3) in another file or via EVAL they'll get wrongfully coalesced
2016-08-10T22:43:11Z stassats: and to hold off circular lists
2016-08-10T22:43:49Z stassats: so, it needs to be measured how big of an impact is it compiling in constant inits
2016-08-10T23:48:28Z scymtym: my conclusion so far: esrap should declare notinline make-instance in the first place since optimizing construction of rule instances at load-time is counterproductive. in sbcl, ctors should handle constants for which EQUAL does not imply EQ like non-constants
2016-08-10T23:49:56Z stassats: should the fop compiler stop ctor optimization?
2016-08-10T23:50:49Z stassats: hard to actually do that
2016-08-10T23:51:08Z stassats: then if stuff that's not a function but doesn't get fop compiled will still get uselessly optimized
2016-08-10T23:51:38Z stassats: how about, compiler-macro->source-transform
2016-08-10T23:57:39Z scymtym: that's a separate concern, right? (defun f () (make-instance 'class :ia '(list of stuff))) needs the previously discussed fix