Do a class invariants affect -release builds?

[Chris Wright via Digitalmars-d-learn]

On Sat, 05 Dec 2015 23:06:22 +0000, Andrew LaChance wrote:

> I was reading a blog post here: http://3d.benjamin-thaut.de/?p=20 which
> mentions:
> 
> "Calls to the druntime invariant handler are emitted in release build
> also and there is no way to turn them off. Even if the class does not
> have any invariants the invariant handler will always be called, walk
> the class hirarchy and generate multiple cache misses without actually
> doing anything."
> 
> I was curious if this was still true today (the post was written 3 years
> ago in Sept 2012).
> 
> Thanks!

It's not true today, as you can test yourself:

class Foo {
	invariant {
		assert(false);
	}

	string str() {
		return this.toString;
	}
}

void main() {
	import std.stdio;
	writeln(new Foo().str);
}

$ rdmd invar.d
core.exception.AssertError at invar.d(3): Assertion failure
$ rdmd -release invar.d
invar.Foo

I've never used a release build of anything. Bounds checking isn't that 
expensive.