To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=85782 Issue #|85782 Summary|there are a number of PLT/function bindings that we're | not saving on startup Component|Word processor Version|OOo 2.3.1 Platform|All URL|http://www.gnome.org/~michael/activity.html OS/Version|All Status|NEW Status whiteboard| Keywords| Resolution| Issue type|DEFECT Priority|P3 Subcomponent|code Assigned to|mmeeks Reported by|utomo99
------- Additional comments from [EMAIL PROTECTED] Fri Feb 1 05:11:35 +0000 2008 ------- quoted: poking at relocations on writer start (from LD_DEBUG=bindings output): variant startup bindings current 91300 -Bsymbolic-functions 63600 -Bsym + vtrelocs 58100 Clearly there are a number of PLT/function bindings that we're not saving on startup. Browsing the remaining relocations I was rather amused to find 2400 relocations on startup (4%) are to please a cunning 31337 'memory-saving' strategy: the thinking goes like this: Instead of having lots of small strings in-line in several libraries, lets have a single copy of each string in a common library (svtools). [ so far, so clever ]. Lets implement that using a symbol per string eg. extern SVT_DLLPUBLIC sal_Char const SVTOOLS_CONSTASCII_DECL( sHTML_S_aacute, "aacute" ); [ oh dear ! - this of course generates a nice const char * rodata string - but it also generates another string in the svtools symbol table: "sHTML_S_aacute", plus another string in -each- shared library that refers to it ]. So - comparing to the approach of using a simple in-line string (also uniquified by any decent compiler & put in rodata), we loose size: ( sizeof "sHTML_S_" + sizeof (relocation) ) * ( num-references + 1 ) and we loose performance: 2400 unique named relocations, searched across 50+ shared libraries: ~0.8% of OO.o CPU time on startup. And all in the name of efficiency. Unfortunately, the technique dates back to the dawn of time, (in cvs history terms), so it's hard to discern the intention. I wonder where else it's used. Anyhow, the 'best' fix (to save the optimisation) is to export one symbol, s_HTML_Strings that is an enumerated array of strings #define sHTML_S_aacute s_HTML_Strings[eHTML_S_aAcute] type thing. But for now, some search/replace action is perhaps easier. --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
