%timeit x.w()
313 ns ± 18.3 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
class X:
__slots__ = ('a')
def w(z):
a = z.a
return a+a+a+a+a
%timeit x.w()
271 ns ± 7.13 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
I think in most cases you have to trust some group of parties. As an individual you likely don't have enough time and expertise to fully validate everything that runs on your hardware.
Do you trust the OSS community, hardware vendors, OS vendors like IBM, Apple, M$, do you trust third party vendors like Crowdstrike?
For me, I prefer to minimize the number of parties I have to trust, and my trust is based on historical track record. I don't mind paying and giving up functionality.