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.venv/lib/python3.8/site-packages/mypyc/doc/cpython-timings.md

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+# Timings of CPython Operations
+
+Here are some *very rough* approximate timings of CPython interpreter
+operations:
+
+* `f(1)` (empty function body): 70-90ns
+* `f(n=1)` (empty function body): 90-110ns
+* `o.x`: 30-40ns
+* `o.f(1)` (empty method body): 80-160ns
+* `Cls(1)` (initialize attribute in `__init__`): 290-330ns
+* `x + y` (integers): 20-35ns
+* `a[i]` (list) : 20-40ns
+* `[i]` (also dealloc): 35-55ns
+* `a.append(i)` (list, average over 5 appends): 70ns
+* `d[s]` (dict, shared str key): 20ns
+* `d[s] = i` (dict, shared str key): 40ns
+* `isinstance(x, A)`: 100ns
+* `(x, y)`: 20-35ns
+* `x, y = t` (tuple expand): 10ns
+
+Note that these results are very imprecise due to many factors, but
+these should give a rough idea of the relative costs of various
+operations.
+
+Details: CPython 3.6.2, Macbook Pro 15" (Mid 2015), macOS Sierra