[Bug 229326] [patch] Mk/bsd.gecko.mk remove forced -O3 optimization

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229326

--- Comment #1 from Kenneth Salerno <kennethsalerno at yahoo.com> ---
I know this will incite heckling and a tomato thrown at me but I also noted
that even the Windows build of firefox uses VC's -O1 (optimize code for minimum
size), similar to Android's -Oz optimization in about:buildconfig. I wouldn't
advocate for -Oz over -O2, but I am suggesting -O3 is not the most desirable
optimization level, particularly for such an already large application like
firefox, where a marginal gain in corner cases cannot overcome larger binary
size that ultimately slows down overall loading and execution. But again, if
anyone has browser benchmarks I would be very interested to study them.

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