<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span>Hi Olivier,</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span><br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>Regarding cross-module optimization and inlining, have a look at these:</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span><br></span></div><div style="background-color:
transparent;"><span>http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.21.4909<br></span></div><div style="background-color: transparent;">http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.2.6496<br></div><div style="background-color: transparent; color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><br></div><div style="background-color: transparent; color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;">Appendix A of the second paper made me realize how much work is going on inside mnesia. For one benchmark, that algorithm decided to inline <span style="font-size: 12pt;">mnesia:dirty_write/2 </span><span style="background-color: transparent;">something like 10 levels deep through 8 modules, resulting in a 1000-line function. The whole
topic needs more work though.</span></div><div style="background-color: transparent; color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><br></div><div style="background-color: transparent; color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><span>Best,</span></div><div style="background-color: transparent; color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><span>Thomas</span></div><div class="yahoo_quoted" style="display: block;"> <br> <br> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande',
sans-serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> On Thursday, October 10, 2013 1:23 PM, Olivier BOUDEVILLE <olivier.boudeville@edf.fr> wrote:<br> </font> </div> <blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div class="y_msg_container"><div id="yiv5228734501"><div><font size="2" face="sans-serif">Indeed! Additionally, it is quite recent.
</font>
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<br clear="none"><font size="2" face="sans-serif">It could be interesting to measure the
speed-up that can actually be obtained, possibly in various settings (native
or not, with the various compilers, etc.); maybe this could also allow
to have Erlang shine a bit more in some benchmarks!<br clear="none">
</font>
<br clear="none"><font size="2" face="sans-serif">Thanks for the pointer (will definitively
try it),</font>
<br clear="none"><font size="2" face="sans-serif"><br clear="none">
Olivier.<br clear="none">
---------------------------<br clear="none">
Olivier Boudeville<br clear="none">
<br clear="none">
EDF R&D : 1, avenue du Général de Gaulle, 92140 Clamart, France<br clear="none">
Département SINETICS, groupe ASICS (I2A), bureau B-226<br clear="none">
Office : +33 1 47 65 59 58 / Mobile : +33 6 16 83 37 22 / Fax : +33 1 47
65 27 13</font>
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<table width="100%"><tbody><tr valign="top"><td colspan="1" rowspan="1" width="40%"><font size="1" face="sans-serif"><b>tony@rogvall.se</b> </font>
<div><font size="1" face="sans-serif">10/10/2013 12:34</font>
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<div align="right"><font size="1" face="sans-serif">A</font></div>
</td><td colspan="1" rowspan="1"><font size="1" face="sans-serif">olivier.boudeville@edf.fr</font>
</td></tr><tr valign="top"><td colspan="1" rowspan="1">
<div align="right"><font size="1" face="sans-serif">cc</font></div>
</td><td colspan="1" rowspan="1"><font size="1" face="sans-serif">erlang-questions@erlang.org</font>
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<div align="right"><font size="1" face="sans-serif">Objet</font></div>
</td><td colspan="1" rowspan="1"><font size="1" face="sans-serif">Re: [erlang-questions] "Fat"
BEAMs?</font></td></tr></tbody></table>
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<br clear="none"><font size="3">Maybe give </font><a rel="nofollow" shape="rect" target="_blank" href="https://github.com/tonyrog/inline"><font size="3" color="blue"><u>https://github.com/tonyrog/inline</u></font></a><font size="3">
a try?</font>
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<br clear="none"><font size="3">/Tony</font>
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<br clear="none"><font size="3">On 10 okt 2013, at 11:56, Olivier BOUDEVILLE <</font><a rel="nofollow" shape="rect" ymailto="mailto:olivier.boudeville@edf.fr" target="_blank" href="mailto:olivier.boudeville@edf.fr"><font size="3" color="blue"><u>olivier.boudeville@edf.fr</u></font></a><font size="3">>
wrote:</font>
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<br clear="none"><font size="2" face="sans-serif">Hi,</font><font size="3"> <br clear="none">
</font><font size="2" face="sans-serif"><br clear="none">
Let's suppose that, thanks to a parse-transform, we fetched recursively
from other modules most if not all code explicitly callable from a given
module, so that the full code (ultimately calling only basic language constructs
and BIFs) ends up in a single (presumably big, unfolded, possibly inlined)
AST. </font><font size="3"><br clear="none">
</font><font size="2" face="sans-serif"><br clear="none">
Then, in the prospect of native compilation (HiPe, possibly others
like ErLLVM), I imagine that not only we should get rid of the overhead
of inter-module calls, but we would also give to the compiler the best
full view on which it could operate and generate the best code it could
manage?</font><font size="3"> <br clear="none">
</font><font size="2" face="sans-serif"><br clear="none">
Has this approach already been attempted? Would it have some potential
interest?</font><font size="3"> <br clear="none">
</font><font size="2" face="sans-serif"><br clear="none">
Thanks in advance for any hint,</font><font size="3"> </font><font size="2" face="sans-serif"><br clear="none">
Best regards,</font><font size="3"> </font><font size="2" face="sans-serif"><br clear="none">
<br clear="none">
Olivier.<br clear="none">
---------------------------<br clear="none">
Olivier Boudeville<br clear="none">
<br clear="none">
EDF R&D : 1, avenue du Général de Gaulle, 92140 Clamart, France<br clear="none">
Département SINETICS, groupe ASICS (I2A), bureau B-226<br clear="none">
Office : +33 1 47 65 59 58 / Mobile : +33 6 16 83 37 22 / Fax : +33 1 47
65 27 13</font>
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