Hi All,

I am getting a performance issue in expect5.43.0 library on IBM AIX 5.3. When I have used exp_fexpectv call for pattern matching with the expect string, the execution latency of the call is approximately 200 ms. In that way, I am able to complete only 4 or 5 transactions per second using the expect library. Even when I bypassed this call and used a separate code to read the file pointer opened by exp_popen, the latency is not reduced.

When I am using expect 5.40.0 expect library on solaris 8, I am not facing this problem.

Do I have to use expect 5.40.0 library on AIX to resolve problem? Or Could this be because of any issue with the AIX 5.3 installation? Please suggest.

Do you install expect from the IBM Linuxtoolbox or do you use some other binary? If you do you may try expect from the toolbox first. If you use some other binary: was it compiled with VAC or GCC? VAC might be preferable when it comes to speed (and compatibility).

I have downloaded expect 5.43 from expect.nist.gov website and installed using gcc. I have used libtcl8.4 along with that.