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Running "time bitbake -pP idle" with a valid cache shows around 800,000 calls to enum creation from python's signal.py. We don't care about this overhead and it adversely affects cache load time quite badly. Try and use _signal directly, falling back to signal, which avoids this overhead we don't need and makes cache loading much faster. (Bitbake rev: 982645110a19ebb94d519926a4e14c8a2a205cfd) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit ee5fce67ce35b025c68aa61e2e758903269ee346) Signed-off-by: Chris Laplante <chris.laplante@agilent.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>