[gentoo-user] Re: firefox-bin optimizations?

[walt <w41ter@gmail.com>]

On 10/04/2010 10:49 PM, Walter Dnes wrote:
> On Thu, Sep 30, 2010 at 12:37:10PM -0700, walt wrote
>> On 09/30/2010 05:30 AM, Mark David Dumlao wrote:
>>> On Thu, Sep 30, 2010 at 8:00 PM, Johannes Kimmel<johannes.kimmel@gmx.de>   wrote:
>>>> On 09/30/2010 12:58 PM, Mark David Dumlao wrote:
>>>>>
>>>>> Heya,
>>>>> I noticed that my firefox-bin is a lot smaller in memory footprint
>>>>> compared to ordinary gentoo-compiled firefox.
>>>>>
>>>>> Does anyone know what compiler flags upstream applies to their
>>>>> firefox?
>>
>> Try entering about:buildconfig in the URL bar.
>
>    I tried it, and for good measure, did some spelunking in the
> .configure file in the firefox tarball.  I have some questions, before
> possibly tweaking the Firefox ebuild and/or .configure on my machine...
>
> --enable-application=xulrunner
> will Firefox run without this?

Some of your questions are answered in file 'configure.in'.
  --enable-application=APP
                           Options include:
                             browser (Firefox)
                             xulrunner

I'm confused about that xulrunner flag because I set it to 'browser' in
my own firefox builds, and so do the binary builds from mozilla. Do you
have the xulrunner USE flag set?

> --enable-pango
> will Firefox run without this?  I have the "moznopango" flag set, which
> is supposed to speed things up, but about:buildconfig indicates that
> pango is enabled.

If you referring to a USE flag, I don't see it anywhere.  Must be obsolete.

>
> --disable-strip --disable-strip-libs --disable-install-strip
> Why?  I thought most packages stripped code after install.

Do you have the 'debug' USE flag set?

> --enable-default-toolkit=cairo-gtk2
> will Firefox run without this?

You need to pick either that one or cairo-qt if you are building on linux.

> --enable-oji
> will Firefox run without this?  And what is "oji"?  I can't find any
> mention of what it does.

Open JVM Integration:  it enables support for the java plugin named
libjavaplugin_oji.so

> --enable-mathml
> I don't really need it right now.

Add "ac_add_options --disable-mathml" to your .mozconfig file.

> --enable-storage
> will Firefox run without this?  The help says...
> "Enable mozStorage module and related components".  Can someone please
> give a short explanation in plain English what this does?

'storage' is the mozilla wrapper for SQLite, but configure.in doesn't
eplain what that means.  I don't see where '--disable-storage' is even
defined, but you can always try it and see what happens.

> --disable-ogg
> One thing I might consider enabling.  Is there a problem with Firefox's
> ogg support, or any other reason to disable it?

I notice that my own firefox builds do compile the code for ogg support,
but I have no idea what it does or if it works correctly.