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Different parts of Mozilla run faster at different optimization levels. For example, cairo, pixman and sqlite are compiled at -O2 because they are fastest at that level while the JS engine is fastest at -Os. [https://bugzilla.mozilla.org/show_bug.cgi?id=409803#c9] If you want to use --enable-optimize, don't add extra optimization flags there. That's a global setting that sets optimization levels [http://lxr.mozilla.org/seamonkey/search?string=MODULE_OPTIMIZE_FLAGS throughout the source tree]. Instead pass non-optimization flags that you care about via CFLAGS and CXXFLAGS during the build. | Different parts of Mozilla run faster at different optimization levels. For example, cairo, pixman and sqlite are compiled at -O2 because they are fastest at that level while the JS engine is fastest at -Os. [https://bugzilla.mozilla.org/show_bug.cgi?id=409803#c9] If you want to use --enable-optimize, don't add extra optimization flags there. That's a global setting that sets optimization levels [http://lxr.mozilla.org/seamonkey/search?string=MODULE_OPTIMIZE_FLAGS throughout the source tree]. Instead pass non-optimization flags that you care about via CFLAGS and CXXFLAGS during the build. | ||
'''Please use the right optimization flags for your compiler.''' | |||
Please see the chart below for information on what compiler flags you should be using. It depends on what compiler you have. | |||
=Compilers= | =Compilers= | ||