This compile task took 3:22, but of that time, the actual compile work took only 2:18: https://evergreen.mongodb.com/task_log_raw/mongodb_mongo_master_enterprise_rhel_80_64_bit_dynamic_required_compile_dist_test_6ddf0cc7c320987e801e24bf171147d1fd7a0a5b_21_03_07_11_05_12/0?type=T#L11831

We spent nearly 30 seconds preparing the virtualenv: https://evergreen.mongodb.com/task_log_raw/mongodb_mongo_master_enterprise_rhel_80_64_bit_dynamic_required_compile_dist_test_6ddf0cc7c320987e801e24bf171147d1fd7a0a5b_21_03_07_11_05_12/0?type=T#L56

That's roughly 15% of the task time(we spent about the same 15% cloning the repo).

Overall, we run about 600 tasks for each build, so that's 300 minutes or 5 hours of compute time spent creating the same virtualenv. For the build above, that represents about 4% of our total compute time.

We should find a way to construct these virtualenvs faster.