Disable the parser cache
Disable the parser cache

I wasn't able to observe a meaningful performance improvement from it, and it requires some file I/O. Here are the times, in seconds, I observed on my ThinkPad T450s with Python 3.6 and Ubuntu 18.04:

                test 1  test 2
    master       8.96    2.59
    this change  8.88    2.62

Test 1 is the total time from:

$ time dash -c 'git clean -dfx && pip install -e . && pytest --ignore tests/test_bin.py'

Test 2 is pytest's reported total time from a subsequent:

$ pytest --ignore tests/test_bin.py

adamfeuer/hy,kartikm/hy