To time use, just put BEGIN blocks between the use statements.

BEGIN { ...1... }
use ModuleA;
BEGIN { ...2... }
use ModuleB;
BEGIN { ...3... }
use ModuleC;
BEGIN { ...4... }
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The above code will get executed in the following order:

...1...
require ModuleA;
import ModuleA;
...2...
require ModuleB;
import ModuleB;
...3...
require ModuleC;
import ModuleC;
...4...
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