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e90a4ea534
As we use a variable length the compiler does not realise that it is a fixed value of either 2 or 4 bytes. Instead of performing the inline comparison itself, the compiler inserts a function call to the generic memcmp routine which is optimised for long comparisons of variable length. That turns out to be quite expensive... Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>