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_archive/rhai_engine/rhaibook/engine/optimize/disable.md

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+Turn Off Script Optimizations
+=============================
+
+{{#include ../../links.md}}
+
+When scripts:
+
+* are known to be run only _once_ and then thrown away,
+
+* are known to contain no dead code,
+
+* do not use constants in calculations
+
+the optimization pass may be a waste of time and resources.
+
+In that case, turn optimization off by setting the optimization level to [`OptimizationLevel::None`].
+
+```rust
+let engine = rhai::Engine::new();
+
+// Turn off the optimizer
+engine.set_optimization_level(rhai::OptimizationLevel::None);
+```
+
+Alternatively, disable optimizations via the [`no_optimize`] feature.