Is there any Program for Perfornance Calculation?

Question

Hi,
Is there any standard program for calculating ABAP program performance? Please help me in this.
Thanks in Advance.
Siva Sankar.

Answer 1

Hi
These are the main performance points where u have to look
there is no program for this
reward if usefull
Performance Tuning is nothing but optimizing the performance of your program through various techniques thus increasing the productivity of the user.
Purpose
In this world of SAP programming, ABAP is the universal language . Often due to the pressure of schedules and deliveries, the main focus of making a efficient program takes a back seat. An efficient program is one which delivers the required output to the user in a finite time as per the complexity of the program, rather than hearing the comment “I put the program to run , have my lunch and come back to check the results”
Use
Leaving aside the hyperbole, a performance optimized ABAP Program has the following uses:
Saves the time of the end user.
Increases the productivity of the user.
In turn keeps the user and hence the management happy.
Challenges
Performance of a program is also often limited due to hardware restrictions, which is out of the scope of this tutorial.
Ways of Performance Tuning
Selection Criteria
Select Statements
Select Queries
SQL Interface
Aggregate Functions
For all Entries
Select Over more than one Internal table
Internal tables
4. Typing
5. Control Statements (If, Case, While..)
6. Field Conversion
7. ABAP Objects
8. Tools for Performance Analysis
Selection Criteria
Restrict the data to the selection criteria itself, rather than filtering it out using the ABAP code using CHECK statement. 
Select with selection list.
Note: It is suggestible to make at least on field mandatory in Selection-Screen as mandatory fields restrict the data selection and hence increasing the performance.
SELECT * FROM SBOOK INTO SBOOK_WA.
CHECK: SBOOK_WA-CARRID = 'LH' AND
SBOOK_WA-CONNID = '0400'.
ENDSELECT.
The above code can be much more optimized by the code written below which avoids CHECK, selects with selection list
SELECT CARRID CONNID FLDATE BOOKID FROM SBOOK INTO TABLE T_SBOOK
WHERE SBOOK_WA-CARRID = 'LH' AND
SBOOK_WA-CONNID = '0400'.
Select Statements Select Queries
Avoid nested selects
Select all the records in a single shot using into table clause of select statement rather than to use Append statements.
When a base table has multiple indices, the where clause should be in the order of the index, either a primary or a secondary index.
For testing existence , use Select.. Up to 1 rows statement instead of a Select-Endselect-loop with an Exit.
Use Select Single if all primary key fields are supplied in the Where condition .
Point # 1
SELECT * FROM EKKO INTO EKKO_WA.
  SELECT * FROM EKAN INTO EKAN_WA
      WHERE EBELN = EKKO_WA-EBELN.
  ENDSELECT.
ENDSELECT.
The above code can be much more optimized by the code written below.
SELECT PF1 PF2 FF3 FF4 INTO TABLE ITAB
    FROM EKKO AS P INNER JOIN EKAN AS F
      ON PEBELN = FEBELN.
Note: A simple SELECT loop is a single database access whose result is passed to the ABAP program line by line. Nested SELECT loops mean that the number of accesses in the inner loop is multiplied by the number of accesses in the outer loop. One should therefore use nested SELECT loops  only if the selection in the outer loop contains very few lines or the outer loop is a SELECT SINGLE statement.
Point # 2
SELECT * FROM SBOOK INTO SBOOK_WA.
CHECK: SBOOK_WA-CARRID = 'LH' AND
SBOOK_WA-CONNID = '0400'.
ENDSELECT.
The above code can be much more optimized by the code written below which avoids CHECK, selects with selection list and puts the data in one shot using into table
SELECT CARRID CONNID FLDATE BOOKID FROM SBOOK INTO TABLE T_SBOOK
WHERE SBOOK_WA-CARRID = 'LH' AND
SBOOK_WA-CONNID = '0400'.
Point # 3
To choose an index, the optimizer checks the field names specified in the where clause and then uses an index that has the same order of the fields . In certain scenarios, it is advisable to check whether a new index can speed up the performance of a program. This will come handy in programs that access data from the finance tables.
Point # 4
SELECT * FROM SBOOK INTO SBOOK_WA
UP TO 1 ROWS
WHERE CARRID = 'LH'.
ENDSELECT.
The above code is more optimized as compared to the code mentioned below for testing existence of a record.
SELECT * FROM SBOOK INTO SBOOK_WA
WHERE CARRID = 'LH'.
EXIT.
ENDSELECT.
Point # 5
If all primary key fields are supplied in the Where condition you can even use Select Single.  Select Single requires one communication with the database system, whereas Select-Endselect needs two.