Here some tests, that can allow you to understand how much you can 'push' TestLink.
Hardware: IBM Laptop - Z60m - Ram: 2GB
Operating System: Fedora 14
Using LAMPP 1.7.7
Test project with:
26700 test cases
Test plan with :
14200 test cases
5 builds
NO platforms
1 milestone
9000 executions
Total executions (ALL testplans ALL testprojects): 36000
elapsed time: 200 seconds (3 min 20 sec)