If you know that a particular program will be executed primarily on a specific machine or set of machines with very similar configurations, you can use a combination of the -qarch, -qtune, and -qcache options to customize for that configuration. These options enable the compiler to speed up the program with processor-specific instructions, rearrange the code for better efficiency on a particular processor, and structure loops to avoid overflowing cache memory.
| Related Information: | See -qarch Option, -qtune Option, -qcache Option, and Compiling for POWER3, POWER2, or PowerPC Systems. |