2015-11-03 20:46 GMT+03:00 Oleg Bartunov <obartu...@gmail.com>: > > > On Mon, Oct 26, 2015 at 11:53 AM, Alexander Lakhin < > a.lak...@postgrespro.ru> wrote: > >> Hello, Peter. >> >> I've managed to speed up html generation from xml (make xslthtml) from 32 >> min. (in my environment) to 4 min. by modifying slowest XSL templates. >> All my modifications incorporated in a single file >> stylesheet-xhtml-speedup.xsl, which is included in stylesheet.xsl. >> I performed optimization by analyzing output of: >> xsltproc --profile --stringparam pg.version '9.6devel' stylesheet.xsl >> postgres.xml >> Initial statistics: >> number match name mode Calls Tot 100us >> Avg >> >> 0 appendix label.markup >> 23090 90677526 3927 >> 1 chapter label.markup >> 28870 39740757 1376 >> 2 chunk-all-sections 1289 23845066 18498 >> 3 make.legalnotice.head.links >> 2578 9630258 3735 >> 4 indexterm reference 2579 4126513 1600 >> 5 html.head 1289 3112534 2414 >> ... >> index % time self children called name >> 0.479 1326.034 22/23090 toc.line [61] >> 5.128 1308.245 21944/23090 sect1[label.markup] [13] >> 3.772 1318.264 850/23090 substitute-markup [15] >> 1.355 1304.631 274/23090 >> figure|table|example[label.markup] [32] >> [0] 47.95 906.775 1.613 23090 appendix[label.markup] [0] >> 1.613 0.000 23090/23090 autolabel.format [29] >> ----------------------------------------------- >> 5.128 1308.245 24708/28870 sect1[label.markup] [13] >> 0.479 1326.034 130/28870 toc.line [61] >> 3.772 1318.264 2112/28870 substitute-markup [15] >> 1.355 1304.631 1920/28870 >> figure|table|example[label.markup] [32] >> [1] 21.01 397.408 1.613 28870 chapter[label.markup] [1] >> 1.613 0.000 28870/28870 autolabel.format [29] >> ----------------------------------------------- >> 0.164 238.606 1289/1289 process-chunk-element [98] >> [2] 12.61 238.451 0.225 1289 chunk-all-sections [2] >> 0.225 7.117 1289/1289 process-chunk [86] >> ----------------------------------------------- >> 31.125 112.261 1289/2578 html.head [5] >> 96.303 96.726 1289/2578 make.legalnotice.head.links [3] >> [3] 5.09 96.303 96.726 2578 make.legalnotice.head.links [3] >> 96.303 96.726 1289/3867 make.legalnotice.head.links [3] >> 0.339 0.494 1289/3867 >> *[object.title.markup.textonly] [69] >> 0.085 0.781 1289/3867 ln.or.rh.filename [116] >> >> ----------------------------------------------- >> >> >> Currrent statistics: >> number match name mode Calls Tot 100us >> Avg >> >> 0 chunk-all-sections 1289 5405958 4193 >> 1 make.legalnotice.head.links >> 1289 3159538 >> 2451 >> 2 html.head 1289 3068417 2380 >> 3 gentext.template 689835 2327761 3 >> 4 l10n.language 564453 1455253 2 >> 5 href.target 29881 1344063 44 >> --- >> index % time self children called name >> 0.136 54.207 1289/1289 process-chunk-element [95] >> [0] 20.40 54.060 0.312 1289 chunk-all-sections [0] >> 0.312 6.468 1289/1289 process-chunk [67] >> ----------------------------------------------- >> 30.684 45.458 1289/1289 html.head [2] >> [1] 11.92 31.595 0.448 1289 make.legalnotice.head.links [1] >> 0.290 0.403 1289/2578 >> *[object.title.markup.textonly] [71] >> 0.159 0.828 1289/2578 ln.or.rh.filename [91] >> ----------------------------------------------- >> 0.330 31.617 1289/1289 chunk-element-content [65] >> [2] 11.58 30.684 45.458 1289 html.head [2] >> 31.595 0.448 1289/15462 make.legalnotice.head.links >> [1] >> 13.441 4.726 5153/15462 href.target [5] >> 0.290 0.403 5153/15462 >> *[object.title.markup.textonly] [71] >> 0.115 1.576 1289/15462 head.content [99] >> 0.012 0.000 1289/15462 system.head.content [186] >> 0.006 0.000 1289/15462 user.head.content [228] >> >> To make sure that result of the transformation is the same, I've compared >> original .html's with .html's generated with modified templates. >> Unfortunately xslt generates random id's, so it's needed to exclude them >> before comparing. I do that with: >> for f in */*.html; do sed -e >> 's/id=\"\(ftn\.\)\?id[a-z][0-9]\+\"/id=\"id\"/g' -i $f ; sed -e >> 's/href=\"[^#]*#\(ftn\.\)\?id[a-z][0-9]\+\"/href=\"#\"/g' -i $f; done >> >> >> So if it's acceptable way to speed up generation of HTML (and maybe some >> other formats), what other steps should we take to move away from SGML? >> If the performance is still not satisfying, please let me know, I'll >> continue to optimize xslt. >> Beside performance issues, I can see some difference in results of 'make >> html' and 'make xslthtml'. For example, see doc/src/sgml/html/spi.html >> (xslt-generated version doesn't contain the lists of functions). >> >> Best regards, >> Alexander > > > I think this is great result and it's worth to start moving to xml. > I think that moving to XML is step backward, because XML is ugly.
> I want to note, that it's 21-th century and we should think about > including pictures into our documentation, which will greatly improve it. > Yeah, +1. > XML makes this easier. > And I think that Lisp is much better for this puprose. -- // Dmitry.
