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16:13:24
drmeister
We need to get more comfortable with dtrace - and incorporate it into our thinking about debugging. It is an amazing tool that makes easy things that are really hard without it.
16:17:08
drmeister
Michele said I should check something with you about your summer employment situation.
16:17:58
drmeister
And I sent an email to the provost thanking them for approving your travel grant.
16:18:42
drmeister
I can't get dtrace to work with iclasp-boehm - that is a frustration. It works great with cclasp-boehm.
16:34:03
drmeister
cracauer: Are you online? Do you ever generate backtraces with dtrace? The output is full of stack frames followed by a number. Does that number mean the number of identical backtraces that were generated sequentially?
16:42:30
Selwyn
@drmeister the availability of the scipy/numpy stack lulls many scientists into a state of complacency regarding programming i think. regrettable but not easy to fix
16:43:11
Selwyn
i am attempting to port 'gsll' to clasp starting from this https://common-lisp.net/project/gsll/
16:43:49
Bike
the stack has cc_landingpadUnwindMatchFrameElseRethrow,then __cxa_rethrow, then __terminate
16:43:50
drmeister
And what scipy and numpy do is somewhat make up for the intolerably slow performance of loops in Python.
16:44:25
drmeister
Bike: Ok, that's our problem - there is an UNWIND that is not finding its target.
17:07:24
drmeister
Clasp has lots of support for weak pointers - I used to use them a lot - but not much these days.
17:08:21
drmeister
They are supported with both garbage collectors. The Common Lisp interface is identical. The underlying machinery is quite different.
17:10:08
drmeister
Currently there is only a weak-key-strong-value hash table - but others are possible
17:11:07
Selwyn
i am thinking of porting trivial-garbage, which is a portable library for manipulating weak pointers and other things. it is a dependency of GSLL.
17:14:40
drmeister
Clasp has finalizers now - you could finish clasp support for trivial-garbage by adding finalizers if you have time.
17:52:42
phoe
drmeister: goodness, this progress that you mention looks like you have reinvented abacus
19:47:33
frgo
Yeah - I had a different association when I looked at that structure: https://www.youtube.com/watch?v=de_0vcAEjhE - I do have such an antenna in my garden behind the house ... Shows that I am a ham radio operator. ;-)
19:51:48
Bike
subtypep is defined including (when (eq t1 t2) (return-from subtypep (values t t))) on top, but (subtypep t t) conses
19:52:10
Bike
a similar (defun foo (t1 t2 &optional env) (when (eq t1 t2) (return-from foo (values t t)))) does not
20:09:36
Kevslinger
drmeister: I was at a Neuroscience poster session today, and the only computer-literate person I could find uses R as their scientific programming language of choice.
20:09:57
Kevslinger
It took everything I had to hold myself from shuddering in fear of the molasses-level efficiency.
20:13:59
Kevslinger
I'm helping a neuroscience lab with automating their image analysis processes, which is why I was there.
20:14:34
Shinmera
Sure, just sayin', you can't really expect biology and medicine people to be programmers.
21:41:37
kpoeck
I did my first parallel build. Seems to take 60 minutes less! 90 min instead of 150 min for a distclean configure build_cboehm build!