benchmark| Potential solution for performance regressions (#3473)

* benchmark| Add benchmarking option to tox

* benchmark| Adds basic performance benchmark baselines for pylint

Here we establish baseline benchmarks for the system when used in
minimal way.

Here we just confirm that -j1 vs -jN gives some boost in performance under
simple situations, establishing a baseline for other benchmarks.

Co-authored-by: Pierre Sassoulas <pierre.sassoulas@gmail.com>

1 files changed, 0 insertions, 0 deletions

diff --git a/tests/input/benchmark_minimal_file.py b/tests/input/benchmark_minimal_file.py
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+++ b/tests/input/benchmark_minimal_file.py