Make using compiled libs with debug code better
snarwin at gmail.com
Tue Oct 19 14:28:47 UTC 2021
On Tuesday, 19 October 2021 at 13:57:31 UTC, Steven Schveighoffer
>> Better to leave assertions on by default, and make you have to
>> go out of your way to turn them off. IMO.
> This would leave Phobos in pretty bad shape for performance.
> Especially with invariants. I know for instance that
> RedBlackTree has an invariant that validates the tree
> correctness on every operation (and this runs before and after
> every function). However, if you build your project with dub,
> every library you depend on (with source available) will be
> built the same as your application. So Phobos is kind of alone
> in this regard based on the way we distribute libraries.
> I'm not sure what the right answer is, but that is what this
> thread is for -- can we solve this in a non-disruptive or
> minimally-disruptive way?
1. Add a `-preview=releaseModeChecks` switch that enables
assertions and contract checks in `-release` builds.
2. Build Phobos's unit tests with and without the new `-preview`
switch and check for performance regressions.
3. Add `debug` to any assertions or contracts that cause
significant performance regressions.
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