Copyright Digital Equipment Corp. All rights reserved. Directs the compiler to optimize the code for the program or module being compiled.
Optimization results in the production of more efficient object code.
1 Enable local optimizations and recognition of common subexpressions. 2 Enable all level 1 optimizations and some global optimizations. 3 Enable all level 2 optimizations and additional global optimizations that improve speed at the cost of extra code size. 4 Enable all level 3 optimizations and inline expansion of procedures and functions.