Modelsim DE 10.2 Top-level Code Coverage Strategy

Hi, I am wondering which strategy would be the best for code coverage analysis of a full design.

Let's say I have a design with 10+ sub-modules; I have testbenches that focus on testing each individual sub-module. For simplification, we assume there is only 1 testbench associated with a sub-module. I am looking for a solution that would prevent having to run all of the testbenches if a sub-module is modified.

I thought of something like as shown below. For each testbench associated with a particular sub-module instance, I save the code coverage statistics for only this particular instance. I'm not 100 sure it would work, but if so, if I modify a sub-module, I could just run again the testbench associated with this particular instance; I would not need to run again the others.

foreach arch $arch_list {
   
  #  Compile the test architecture
   vcom -work work -2008 
  #  Restart and Run the simulation
   restart -f
   run -all
  #  save code coverage statistics
    coverage save -code bcefs -instance sim:/testbench/<associated instance>_inst 
}
vcover merge  
coverage open 
coverage report -byinstance -file  -detail -code {s b c e f } -noexcludedhits

Any idea if this could work? Or do you have a better strategy?

Thank you for your time

Damien