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Question by SeRoX · Jun 17, 2010 at 01:08 AM · optimizationcompiler

Optimizations in scripts

I would like to know if Unity applies any optimization on C# scripts like loop unrolling, folding, common subexpression elimination, etc.

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Answer by _Petroz · Jun 17, 2010 at 06:57 AM

I'm pretty sure Unity does not modify the C# code before passing it to the mono compiler. Mono does some simple optimizations during compilation.

There is some info here: http://www.mono-project.com/Mcs

The compiler performs a number of simple optimizations on its input: constant folding (this is required by the C# language spec) and can perform dead code elimination.

Loop unrolling only offers significant performance improvement for tight loops, which is something which should probably be written in native code.

-Pete

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