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Chapter 20 Preprocessor

20-5

20.3 Optimization

#pragma optimize (Preprocessor Statement)

Function

Designates optimization to be executed for each program.

Format

#pragma optimize (“<Option list>”, {on/off})

Explanation

This statement designates optimization to be executed for each program.

Describe this statement on the line before the PROGRAM declaration

statement or on a valid statement line.

Designate an arbitrary number of parameters, listed on the following table for

<Option list>.

Parameter Optimization type

Deletes the array inspection code.

Deletes the cycle time calculation code.

Remarks: If you effectively use the optimization option, you can

increase the execution speed of a non-action instruction by

10% to 20 %. When you select [File] and then [Project

setting] in the PAC manager, you can find the program

setting table. There is also a program optimization option

there.

Example

#pragma optimize( “ac”, ON ) 'Deletes the array inspection code and makes the

'cycle time calculation code valid.

Note

This command has priority over the status set in “Project setting” of the PAC

manager. Therefore, if the array inspection code is deleted, the system does

not check the range of the array subscripts although the error process is set

with ON ERROR GOTO.

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