SAS9 Regular Expression Test (for a string of strings)
The test case is as follows:
1, no string replacement without using regular expressions
Data _null_;
Length A B $ 2000;
DO i = 1 to 500;
a = "dsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssss
Ssssssssssssssssssssssssssssssss ";
B = TRANWRD (A, "S", "W");
END;
PUT A = B =;
Run;
The result of the operation is:
Note: Time used in "DATA statement":
Actual time 0.47 seconds
CPU time 0.47 seconds
2, use the regular expression to replace the string
Data _null_;
Length A B $ 2000;
GT_RE = prxParse ('s / s / w / ");
DO i = 1 to 500;
a = "dsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssdsfdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss";
B = a;
Call Prxchange (gt_re, -1, b);
END;
PUT A = B =;
Run;
The result of the operation is:
Note: Time used in "DATA statement":
Actual time 45.71 seconds
CPU time 43.91 seconds
After test, it can be seen that the running time of 2 is very different, not a level
Therefore, it is recommended that it is best not to use regular expressions in programs that are required to run speed.
