GET RUN TIME

Syntax

GET RUN TIME FIELD rtime.

Effect

At the first execution of GET RUN TIME after the creation of an internal mode, the value 0 is placed into the variable rtime. At each further execution in the same internal mode, the program runtime that has elapsed since the first execution, in seconds, is placed into the variable rtime. The return value of the statement is of the data type i.

Notes

To measure the runtime of program sections, a GET RUN TIME statement can be executed before and after the required section and then the difference of the results can be created. The sequence of statements set within limits is called measuring section, and the time duration determined for it is caled measuring interval.
Using the statement SET RUN TIME CLOCK RESOLUTION, the measuring precisiion can be defined before the first execution of GET RUN TIME, which is used to determine the runtime.
The maximum resolution of the command GET RUN TIME is a microsecond. Shorter meaasuring intervals cannot be determined reliably.
The value area of the return value of the statement must be adhered to. You should not create too large measuring sections (not greater than 1,000 s) nor should any measuring sections be created through accesses to external data or through screen calls, and so on.
As of Release 6.40, the class CL_ABAP_RUNTIME provides methods for generating objects whose method GET_RUNTIME can be used to execute several runtime measurements with different resolutions in an internal mode (see also class for runtime measurements).
The runtime of the program sections can also be determined using the tool runtime analysis.

Example

Determining the calculation time for calculating the tangent of 1. Since the runtime of the statement is less than a microsecond, the runtime of several executions in an inner loop is measured. The exection time for the loop itself is also measured in order to deduct it as an offset. These measurements are executed several times in an outer loop and the mean value is created using division by n0. Through division by ni, the runtime of an individual statement is determined.

DATA: t0    TYPE i,
      t1    TYPE i,
      t2    TYPE i,
      t3    TYPE i,
      t4    TYPE i,
      tm    TYPE f,
      no    TYPE i VALUE 100,
      ni    TYPE i VALUE 1000,
      res   TYPE f.

DO no TIMES.
  GET RUN TIME FIELD t1.
  DO ni TIMES.
    res = TAN( 1 ).
  ENDDO.
  GET RUN TIME FIELD t2.
  GET RUN TIME FIELD t3.
  DO ni TIMES.
  ENDDO.
  GET RUN TIME FIELD t4.
  t0 = t0 + ( ( t2 - t1 ) - ( t4 - t3 ) ).
ENDDO.

tm = t0 / ni / no.