@decorator<EOL>def x_runtime(f, *args, **kwargs):
_t0 = now()<EOL>r = f(*args, **kwargs)<EOL>_t1 = now()<EOL>r.headers['<STR_LIT>'] = '<STR_LIT>'.format(Decimal(str(_t1 - _t0)))<EOL>return r<EOL>
X-Runtime Flask Response Decorator.