From: Nicholas Clark Date: Tue, 10 Dec 2002 18:55:28 +0000 (+0000) Subject: 2% speedup (pp_entersub needs to go on a diet) X-Git-Tag: accepted/trunk/20130322.191538~25033 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f102516803701091b282e6039ff74d44a59d87f0;p=platform%2Fupstream%2Fperl.git 2% speedup (pp_entersub needs to go on a diet) Message-ID: <20021210185527.GG288@Bagpuss.unfortu.net> p4raw-id: //depot/perl@18340 --- diff --git a/pp_hot.c b/pp_hot.c index 03855f3..5d2388d 100644 --- a/pp_hot.c +++ b/pp_hot.c @@ -2457,6 +2457,16 @@ PP(pp_entersub) if (!sv) DIE(aTHX_ "Not a CODE reference"); switch (SvTYPE(sv)) { + /* This is overwhelming the most common case: */ + case SVt_PVGV: + if (!(cv = GvCVu((GV*)sv))) + cv = sv_2cv(sv, &stash, &gv, FALSE); + if (!cv) { + ENTER; + SAVETMPS; + goto try_autoload; + } + break; default: if (!SvROK(sv)) { char *sym; @@ -2494,18 +2504,10 @@ PP(pp_entersub) case SVt_PVHV: case SVt_PVAV: DIE(aTHX_ "Not a CODE reference"); + /* This is the second most common case: */ case SVt_PVCV: cv = (CV*)sv; break; - case SVt_PVGV: - if (!(cv = GvCVu((GV*)sv))) - cv = sv_2cv(sv, &stash, &gv, FALSE); - if (!cv) { - ENTER; - SAVETMPS; - goto try_autoload; - } - break; } ENTER; @@ -2513,35 +2515,7 @@ PP(pp_entersub) retry: if (!CvROOT(cv) && !CvXSUB(cv)) { - GV* autogv; - SV* sub_name; - - /* anonymous or undef'd function leaves us no recourse */ - if (CvANON(cv) || !(gv = CvGV(cv))) - DIE(aTHX_ "Undefined subroutine called"); - - /* autoloaded stub? */ - if (cv != GvCV(gv)) { - cv = GvCV(gv); - } - /* should call AUTOLOAD now? */ - else { -try_autoload: - if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), - FALSE))) - { - cv = GvCV(autogv); - } - /* sorry */ - else { - sub_name = sv_newmortal(); - gv_efullname3(sub_name, gv, Nullch); - DIE(aTHX_ "Undefined subroutine &%s called", SvPVX(sub_name)); - } - } - if (!cv) - DIE(aTHX_ "Not a CODE reference"); - goto retry; + goto fooey; } gimme = GIMME_V; @@ -2551,70 +2525,8 @@ try_autoload: DIE(aTHX_ "No DBsub routine"); } - if (CvXSUB(cv)) { -#ifdef PERL_XSUB_OLDSTYLE - if (CvOLDSTYLE(cv)) { - I32 (*fp3)(int,int,int); - dMARK; - register I32 items = SP - MARK; - /* We dont worry to copy from @_. */ - while (SP > mark) { - SP[1] = SP[0]; - SP--; - } - PL_stack_sp = mark + 1; - fp3 = (I32(*)(int,int,int))CvXSUB(cv); - items = (*fp3)(CvXSUBANY(cv).any_i32, - MARK - PL_stack_base + 1, - items); - PL_stack_sp = PL_stack_base + items; - } - else -#endif /* PERL_XSUB_OLDSTYLE */ - { - I32 markix = TOPMARK; - - PUTBACK; - - if (!hasargs) { - /* Need to copy @_ to stack. Alternative may be to - * switch stack to @_, and copy return values - * back. This would allow popping @_ in XSUB, e.g.. XXXX */ - AV* av; - I32 items; - av = GvAV(PL_defgv); - items = AvFILLp(av) + 1; /* @_ is not tieable */ - - if (items) { - /* Mark is at the end of the stack. */ - EXTEND(SP, items); - Copy(AvARRAY(av), SP + 1, items, SV*); - SP += items; - PUTBACK ; - } - } - /* We assume first XSUB in &DB::sub is the called one. */ - if (PL_curcopdb) { - SAVEVPTR(PL_curcop); - PL_curcop = PL_curcopdb; - PL_curcopdb = NULL; - } - /* Do we need to open block here? XXXX */ - (void)(*CvXSUB(cv))(aTHX_ cv); - - /* Enforce some sanity in scalar context. */ - if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { - if (markix > PL_stack_sp - PL_stack_base) - *(PL_stack_base + markix) = &PL_sv_undef; - else - *(PL_stack_base + markix) = *PL_stack_sp; - PL_stack_sp = PL_stack_base + markix; - } - } - LEAVE; - return NORMAL; - } - else { + if (!(CvXSUB(cv))) { + /* This path taken at least 75% of the time */ dMARK; register I32 items = SP - MARK; AV* padlist = CvPADLIST(cv); @@ -2692,6 +2604,105 @@ try_autoload: #endif RETURNOP(CvSTART(cv)); } + else { +#ifdef PERL_XSUB_OLDSTYLE + if (CvOLDSTYLE(cv)) { + I32 (*fp3)(int,int,int); + dMARK; + register I32 items = SP - MARK; + /* We dont worry to copy from @_. */ + while (SP > mark) { + SP[1] = SP[0]; + SP--; + } + PL_stack_sp = mark + 1; + fp3 = (I32(*)(int,int,int))CvXSUB(cv); + items = (*fp3)(CvXSUBANY(cv).any_i32, + MARK - PL_stack_base + 1, + items); + PL_stack_sp = PL_stack_base + items; + } + else +#endif /* PERL_XSUB_OLDSTYLE */ + { + I32 markix = TOPMARK; + + PUTBACK; + + if (!hasargs) { + /* Need to copy @_ to stack. Alternative may be to + * switch stack to @_, and copy return values + * back. This would allow popping @_ in XSUB, e.g.. XXXX */ + AV* av; + I32 items; + av = GvAV(PL_defgv); + items = AvFILLp(av) + 1; /* @_ is not tieable */ + + if (items) { + /* Mark is at the end of the stack. */ + EXTEND(SP, items); + Copy(AvARRAY(av), SP + 1, items, SV*); + SP += items; + PUTBACK ; + } + } + /* We assume first XSUB in &DB::sub is the called one. */ + if (PL_curcopdb) { + SAVEVPTR(PL_curcop); + PL_curcop = PL_curcopdb; + PL_curcopdb = NULL; + } + /* Do we need to open block here? XXXX */ + (void)(*CvXSUB(cv))(aTHX_ cv); + + /* Enforce some sanity in scalar context. */ + if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { + if (markix > PL_stack_sp - PL_stack_base) + *(PL_stack_base + markix) = &PL_sv_undef; + else + *(PL_stack_base + markix) = *PL_stack_sp; + PL_stack_sp = PL_stack_base + markix; + } + } + LEAVE; + return NORMAL; + } + + assert (0); /* Cannot get here. */ + /* This is deliberately moved here as spaghetti code to keep it out of the + hot path. */ + { + GV* autogv; + SV* sub_name; + + fooey: + /* anonymous or undef'd function leaves us no recourse */ + if (CvANON(cv) || !(gv = CvGV(cv))) + DIE(aTHX_ "Undefined subroutine called"); + + /* autoloaded stub? */ + if (cv != GvCV(gv)) { + cv = GvCV(gv); + } + /* should call AUTOLOAD now? */ + else { +try_autoload: + if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), + FALSE))) + { + cv = GvCV(autogv); + } + /* sorry */ + else { + sub_name = sv_newmortal(); + gv_efullname3(sub_name, gv, Nullch); + DIE(aTHX_ "Undefined subroutine &%s called", SvPVX(sub_name)); + } + } + if (!cv) + DIE(aTHX_ "Not a CODE reference"); + goto retry; + } } void