Could you post a benchmark from MC > Help?
=== Running Benchmarks (please do not interrupt) ===
Running 'Math' benchmark...
Single-threaded integer math... 3.666 seconds
Single-threaded floating point math... 2.532 seconds
Multi-threaded integer math... 1.236 seconds
Multi-threaded mixed math... 0.865 seconds
Score: 2290
Running 'Image' benchmark...
Image creation / destruction... 1.500 seconds
Flood filling... 0.247 seconds
Direct copying... 0.400 seconds
Small renders... 0.848 seconds
Bilinear rendering... 0.663 seconds
Bicubic rendering... 0.391 seconds
Score: 5432
Running 'Database' benchmark...
Create database... 0.117 seconds
Populate database... 0.855 seconds
Save database... 0.276 seconds
Reload database... 0.061 seconds
Search database... 1.118 seconds
Sort database... 0.889 seconds
Group database... 0.627 seconds
Score: 5453
JRMark (version 25.0.40 64 bit): 4391