# Which optimization level would turn off @assert in run time?
**URL:** https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542
**Category:** New to Julia
**Tags:** question
**Created:** [September 4, 2018, 3:20pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542 "2018-09-04T15:20:40Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@tomtom](https://discourse.julialang.org/u/tomtom)
#### Post date: [September 4, 2018, 3:20pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/1 "2018-09-04T15:20:41Z")
sorry, maybe a dump question, but I failed to find relevant docs …
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### Author:  [@Elrod](https://discourse.julialang.org/u/Elrod)
#### Post date: [September 4, 2018, 4:51pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/2 "2018-09-04T16:51:14Z")
None. They do not get turned off.
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### Author:  [@Sukera](https://discourse.julialang.org/u/Sukera)
#### Post date: [September 4, 2018, 5:01pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/3 "2018-09-04T17:01:34Z")
I’m not sure how it is in julia, but generally assertions can be used by the compiler as guarantees - after all, they assert a certain property. More guarantees can lead to more optimizations, which I’m not sure you want to reduce.
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### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [September 4, 2018, 5:04pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/4 "2018-09-04T17:04:34Z")
Cf
[https://github.com/JuliaLang/julia/issues/10614](https://github.com/JuliaLang/julia/issues/10614)
[https://github.com/JuliaLang/julia/pull/25576](https://github.com/JuliaLang/julia/pull/25576)
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### Author:  [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)
#### Post date: [September 4, 2018, 5:17pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/5 "2018-09-04T17:17:48Z")
None currently, but it is documented that such an option might exist in the future, so the macro shouldn’t be used for side effects that are needed for correctness.
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### Author:  [@tomtom](https://discourse.julialang.org/u/tomtom)
#### Post date: [September 4, 2018, 11:19pm UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/6 "2018-09-04T23:19:48Z")
so, if I understand the PRs correctly, seems like **_in future releases_** we should use `@check` (rather than `@assert`) and then enable/disable it by `--debug={yes|no}` ?
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### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [September 5, 2018, 5:16am UTC](https://discourse.julialang.org/t/which-optimization-level-would-turn-off-assert-in-run-time/14542/7 "2018-09-05T05:16:06Z")
Possibly, but these are open questions at the moment.