1 files changed, 191 insertions, 0 deletions
diff --git a/tests/perf_bench/core_locals.py b/tests/perf_bench/core_locals.py
new file mode 100644
index 0000000000..d28e078b26
--- /dev/null
+++ b/tests/perf_bench/core_locals.py
@@ -0,0 +1,191 @@
+# This tests the performance of an instance class locals dict (importantly, that has all keys as qstrs)
+
+# These are all shorter than 10 characters, so will be interned by the parser.
+ZEN = [
+    "the",
+    "zen",
+    "of",
+    "python",
+    "beautiful",
+    "is",
+    "better",
+    "than",
+    "ugly",
+    "explicit",
+    "is",
+    "better",
+    "than",
+    "implicit",
+    "simple",
+    "is",
+    "better",
+    "than",
+    "complex",
+    "complex",
+    "is",
+    "better",
+    "than",
+    "complicate",
+    "flat",
+    "is",
+    "better",
+    "than",
+    "nested",
+    "sparse",
+    "is",
+    "better",
+    "than",
+    "dense",
+    "readabilit",
+    "counts",
+    "special",
+    "cases",
+    "arent",
+    "special",
+    "enough",
+    "to",
+    "break",
+    "the",
+    "rules",
+    "although",
+    "practicali",
+    "beats",
+    "purity",
+    "errors",
+    "should",
+    "never",
+    "pass",
+    "silently",
+    "unless",
+    "explicitly",
+    "silenced",
+    "in",
+    "the",
+    "face",
+    "of",
+    "ambiguity",
+    "refuse",
+    "the",
+    "temptation",
+    "to",
+    "guess",
+    "there",
+    "should",
+    "be",
+    "one",
+    "and",
+    "preferably",
+    "only",
+    "one",
+    "obvious",
+    "way",
+    "to",
+    "do",
+    "it",
+    "although",
+    "that",
+    "way",
+    "may",
+    "not",
+    "be",
+    "obvious",
+    "at",
+    "first",
+    "unless",
+    "youre",
+    "dutch",
+    "now",
+    "is",
+    "better",
+    "than",
+    "never",
+    "although",
+    "never",
+    "is",
+    "often",
+    "better",
+    "than",
+    "right",
+    "now",
+    "if",
+    "the",
+    "implementa",
+    "is",
+    "hard",
+    "to",
+    "explain",
+    "its",
+    "a",
+    "bad",
+    "idea",
+    "if",
+    "the",
+    "implementa",
+    "is",
+    "easy",
+    "to",
+    "explain",
+    "it",
+    "may",
+    "be",
+    "a",
+    "good",
+    "idea",
+    "namespaces",
+    "are",
+    "one",
+    "honking",
+    "great",
+    "idea",
+    "",
+    "lets",
+    "do",
+    "more",
+    "of",
+    "those",
+]
+
+
+class A:
+    pass
+
+
+def test(niter):
+    for _ in range(niter):
+        a = A()
+        for _ in range(niter):
+            for word in ZEN:
+                setattr(a, word, getattr(a, word, 0) + 1)
+
+    return (
+        getattr(a, "python"),
+        getattr(a, "is"),
+        getattr(a, "than"),
+    )
+
+
+###########################################################################
+# Benchmark interface
+
+bm_params = {
+    (32, 10): (2,),
+    (50, 10): (4,),
+    (100, 10): (8,),
+    (500, 10): (40,),
+    (1000, 10): (80,),
+    (5000, 10): (400,),
+}
+
+
+def bm_setup(params):
+    (niter,) = params
+    state = None
+
+    def run():
+        nonlocal state
+        state = test(niter)
+
+    def result():
+        return niter, state
+
+    return run, result