The tssem1 runs very slowly. tssem1 does not work when using a random effects model

Dear Dr. Cheung,

Hello, recently I want to use TSSEM to determine the structure of a scale. I am pooling 30 correlation matrices of size 38x38 using the 'tssem1' function. However, tssem1 runs quite slowly, taking at least 6 hours for each computation.

Do you have any suggestions to make it run faster?