I changed myconfigure to

./configure --prefix=$HOME --with-toolbox=$HOME/toolbox/ --with-boost=/opt/local/include/ CXXFLAGS=" -pipe -g -O2 -march=core2 -DNDEBUG" --disable-static

based on reading From http://www.gentoo.org/doc/en/gcc-optimization.xml, including:

-O2: A step up from -O1. This is the recommended level of optimization unless you have special needs. -O2 will activate a few more flags in addition to the ones activated by -O1. With -O2, the compiler will attempt to increase code performance without compromising on size, and without taking too much compilation time.
-O3: This is the highest level of optimization possible, and also the riskiest. It will take a longer time to compile your code with this option, and in fact it should not be used system-wide with gcc 4.x. The behavior of gcc has changed significantly since version 3.x. In 3.x, -O3 has been shown to lead to marginally faster execution times over -O2, but this is no longer the case with gcc 4.x. Compiling all your packages with -O3 will result in larger binaries that require more memory, and will significantly increase the odds of compilation failure or unexpected program behavior (including errors). The downsides outweigh the benefits; remember the principle of diminishing returns. Using -O3 is not recommended for gcc 4.x.

myconfigure

@@ -1,4 +1 @@
-./configure --prefix=$HOME --with-toolbox=$HOME/toolbox/ --with-boost=/opt/local/include/
-
-# for maximum performance on Intel Core2 platform:
-#./configure --prefix=$HOME --with-toolbox=$HOME/toolbox/ --with-boost=/opt/local/include/ CXXFLAGS=" -g -O3 -ftree-vectorizer-verbose=2 -march=core2 -DNDEBUG" --disable-static
+./configure --prefix=$HOME --with-toolbox=$HOME/toolbox/ --with-boost=/opt/local/include/ CXXFLAGS=" -g -O2 -march=core2 -DNDEBUG" --disable-static