Re: Emacs 23.0 is much slower starting than Emacs 22.3

[David De La Harpe Golden <david@harpegolden.net>]

David De La Harpe Golden wrote:


> +++ Which leaves set-auto-mode...

Which seems to be mostly the particular mode - So of course, this can 
presumably vary wildly from mode to mode, but let's take c-mode (seeing 
as it's for the c files I was testing with):

set-auto-mode->set-auto-mode-0->
c-mode-> (c-init-language-vars-for,
c-common-init->(c-basic-common-init,
run some internal hooks, like the "neutralize"), ...)

See existing c-neutralize-syntax-in-CPP initial comment:
"SPEED _MATTERS_ IN THIS FUNCTION!!!"

Profiling confirms - yes, it does. :-)


find-file-noselect            180         3.1810370000  0.0176724277
find-file-noselect-1          180         2.48014       0.0137785555
after-find-file               180         2.1637470000  0.0120208166
normal-mode                   180         2.010236      0.0111679777
set-auto-mode                 180         1.0771709999  0.0059842833
set-auto-mode-0               180         1.0480739999  0.0058226333
c-mode                        180         1.047115      0.0058173055
hack-local-variables          180         0.9007970000  0.0050044277
c-common-init                 180         0.8647119999  0.0048039555
c-neutralize-syntax-in-CPP    180         0.7705030000  0.0042805722
run-hooks                     2357        0.2052220000  8.706...e-05
c-init-language-vars-for      180         0.112398      0.0006244333
c-basic-common-init           180         0.0799130000  0.0004439611
c-neutralize-CPP-line         14000       0.0594100000  4.243...e-06
make-local-variable           10477       0.0177539999  1.694...e-06
set-auto-mode-1               362         0.0149190000  4.121...e-05
kill-all-local-variables      361         0.0091960000  2.547...e-05
c-setup-paragraph-variables   361         0.0060069999  1.663...e-05
c-update-modeline             360         0.005464      1.517...e-05
c-extend-region-for-CPP       180         0.0043769999  2.431...e-05
c-font-lock-init              180         0.0036940000  2.052...e-05
cc-imenu-init                 180         0.0008029999  4.461...e-06
c-initialize-cc-mode          180         0.0003749999  2.083...e-06
easy-menu-add                 180         0.0002349999  1.305...e-06
set-syntax-table              182         0.0001749999  9.615...e-07
use-local-map                 182         0.0001659999  9.120...e-07