For me it returns 1.6s on first run, .9s on second (bazel 0.29.1).
$ time (echo 'quit()' | python) real 0m0.025s user 0m0.000s sys 0m0.031s $ time (echo 'quit()' | python3) real 0m0.036s user 0m0.031s sys 0m0.016s
For me it returns 1.6s on first run, .9s on second (bazel 0.29.1).