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Compiler Options
Plorence edited this page Mar 11, 2020
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| Options | Optimization Level | Execution Time | Code Size | Memory Usage | Compile Time |
|---|---|---|---|---|---|
| -O0 | optimization for compilation time (default) | + | + | - | - |
| -O1(O) | optimization for code size and execution time | - | - | + | + |
| -O2 | optimization more for code size and execution time | -- | + | ++ | |
| -O3 | optimization more for code size and execution time | --- | + | +++ | |
| -Os | optimization for code size | -- | ++ | ||
| -Ofast | O3 with fast none accurate math calculations | --- | + | +++ |
+increase ++increase more +++increase even more -reduce --reduce more ---reduce even more
Origin here, GCC online docs here