I confirmed about performance of this screen.
In Japan, search performance of this screen on actual environment is bad too.
- this screen (on production environment) used time about 8 minutes.
- this screen (on test environment) used time about 2 seconds.
So I think that this cause is not network, PC's performance.
And then I confirmed the record count of MSTBLESS, MSTBPRDM and etc. (these are search objective tables of this screen) on each environments.
The record count on actual environment is more than records count on test environment.
(MSTBLESS : 1214 records on actual , 133 records on actual)
From the above, I think that SQL statement for search data is not good.
SQL statement should be modified for search performance improvement.
I will consider the way of performance improvement.