[joeycumines]

From the concurrent prime sieve example?

That's just something I copy and pasted from the documentation for the benchmark package I used. Allegedly, it is to prevent "certain compiler optimisations", which is something I'm familiar with when it comes to benchmarking Go code, for example.

I lack specific knowledge as to whether it's actually necessary, sorry :)

[yunohn]

Ah, gotcha!

I thought maybe it was something to do with concurrency, and somehow x is affected by a race condition there.