Add allocate-dicts heap benchmark

Author: steve-s

graalpython/com.oracle.graal.python.benchmarks/python/heap/allocate-dicts.py

@@ -0,0 +1,66 @@
+# Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# The Universal Permissive License (UPL), Version 1.0
+#
+# Subject to the condition set forth below, permission is hereby granted to any
+# person obtaining a copy of this software, associated documentation and/or
+# data (collectively the "Software"), free of charge and under any and all
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+# freely licensable by each licensor hereunder covering either (i) the
+# unmodified Software as contributed to or provided by such licensor, or (ii)
+# the Larger Works (as defined below), to deal in both
+#
+# (a) the Software, and
+#
+# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+# one is included with the Software each a "Larger Work" to which the Software
+# is contributed by such licensors),
+#
+# without restriction, including without limitation the rights to copy, create
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+# Software and the Larger Work(s), and to sublicense the foregoing rights on
+# either these or other terms.
+#
+# This license is subject to the following condition:
+#
+# The above copyright notice and either this complete permission notice or at a
+# minimum a reference to the UPL must be included in all copies or substantial
+# portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import time
+
+# follows the distribution of dict sizes in import-a-lot benchmark
+#
+# OQL query:
+# var objs = toArray(heap.objects("com.oracle.graal.python.builtins.objects.common.ObjectHashMap", false));
+# var counts = {};
+# for each (var m in objs) {
+#  var s = m.size;
+#  counts[s] = counts[s] == null ? 1 : counts[s] + 1;
+# }
+# map(sort(unique(map(objs, "it.size")), "lhs - rhs"),
+#    function (s) { return { size: s, count: counts[s] }; })
+
+FACTOR = 500
+N = 256 + 8
+keys = [str(i) for i in range(N)]
+small_dicts0  = [{} for i in range(22 * FACTOR)]
+small_dicts1  = [{1:1} for i in range(215 * FACTOR)]
+small_dicts2  = [{1:1, 2:3} for i in range(220 * FACTOR)]
+small_dicts4  = [{keys[k % N]:1 for k in range(4)} for i in range(145 * FACTOR)]
+small_dicts8  = [{keys[k % N]:1 for k in range(8)} for i in range(51 * FACTOR)]
+dicts1 = [{(keys[k % N]):1 for k in range(8 + i % 256)} for i in range(61 * FACTOR)]
+
+# Sleep a bit to shake out weakref callbacks and get more measurement samples
+for i in range(30):
+    time.sleep(0.1)

mx.graalpython/mx_graalpython_bench_param.py

@@ -364,6 +364,7 @@ def _pickling_benchmarks(module='pickle'):
         "post-startup": [],
         "import-a-lot": [],
         "allocate-objects": [],
+        "allocate-dicts": [],
     }],
     "micro-small-heap": [PATH_MICRO, MICRO_BENCHMARKS_SMALL],
 }