PSA: Deactivate Windows Security for your Source Reposity
Or: How I cut my compile times in half— 2 min
I’m very happy that I have been moving to a somewhat large Rust project recently ;-) And because of the COVID mandated home-office, I have started doing a lot more development on my Desktop, which runs Windows for gaming reasons.
Anyhow. So far I had no reason to complain about compile times, since my
(still, but not for long) oil cooled Ryzen has a lot of cores and power. But I
was noticing that quite a lot of annoying Windows Security notifications have
been popping up when doing compiles, or in general when
running in the background. I also noticed that for some reason, the CPU was
also not being utilized fully when doing builds.
So I began researching, and profiling. Running nightly cargo with
revealed that especially custom build scripts were taking a very long time.
My research yielded
this cargo issue which was
talking about windows defender. There is also an official windows
on how to disable windows security for a whole directory tree.
I just went ahead and tried doing that.
Disabling Windows Security for my whole coding directory improved my clean
cargo test times of
sentry-rust from 3m17s to 1m22s. What a jaw
dropping difference. My compile times are cut by more than half !!!,
and the annoying notifications are gone as well.
So for anyone on Windows, go ahead and add a security exception, and save yourself some headaches!
A word of caution though, as I advocate for disabling a security feature.
I think as developers, we are all a bit more cautious than regular people when
it comes to internet security. On the other hand, we download and run tons of
third party software from package archives all the time. And software supply
chain attacks are a real thing, should I remind everyone of the
Nonetheless, I don’t think Windows Security would actually help in such a case,
so I doubt we are worse off disabling it.