chore: import upstream snapshot with attribution

2026-07-13 12:25:07 +08:00
commit a26e856398
1681 changed files with 296950 additions and 0 deletions
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+#  ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+#  ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
+#  ┃ ▄▄▄▄▄█ █▄▄▄▄▄ ▄▄▄▄▄█  ▀▀▀▀▀█▀▀▀▀▀ █ ▀▀▀▀▀█ ████████▌▐███ ███▄  ▀█ █ ▀▀▀▀▀ ┃
+#  ┃ █▀▀▀▀▀ █▀▀▀▀▀ █▀██▀▀ ▄▄▄▄▄ █ ▄▄▄▄▄█ ▄▄▄▄▄█ ████████▌▐███ █████▄   █ ▄▄▄▄▄ ┃
+#  ┃ █      ██████ █  ▀█▄       █ ██████      █      ███▌▐███ ███████▄ █       ┃
+#  ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
+#  ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
+#  ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
+#  ┃ This file is part of the Perspective library, distributed under the terms ┃
+#  ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
+#  ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+
+import psutil
+import os
+import perspective as psp
+
+client = psp.Server().new_local_client()
+Table = client.table
+
+
+class TestDelete(object):
+    # delete
+
+    def test_table_delete(self):
+        process = psutil.Process(os.getpid())
+        data = [{"a": 1, "b": 2}, {"a": 3, "b": 4}]
+        tbl = Table(data)
+        tbl.delete()
+        mem = process.memory_info().rss
+
+        for x in range(10000):
+            data = [{"a": 1, "b": 2}, {"a": 3, "b": 4}]
+            tbl = Table(data)
+            tbl.delete()
+
+        mem2 = process.memory_info().rss
+
+        # assert 1 < (max2 / max) < 1.01
+        assert (mem2 - mem) < 2000000
+
+    def test_table_delete_with_view(self, sentinel):
+        data = [{"a": 1, "b": 2}, {"a": 3, "b": 4}]
+        tbl = Table(data)
+
+        process = psutil.Process(os.getpid())
+        mem = process.memory_info().rss
+        for x in range(10000):
+            view = tbl.view()
+            view.delete()
+
+        tbl.delete()
+        mem2 = process.memory_info().rss
+        assert (mem2 - mem) < 2000000
+
+
+class TestExpressionVocab(object):
+    # Regression tests for the `t_expression_vocab` leak fixed in PR #3175.
+    # Pre-fix, updates against a view with a string-producing expression
+    # interned each result into a new 4KB vocab page once the prior page
+    # filled, and never deduplicated against older pages. RSS grew without
+    # bound. The fix adds cross-page deduplication; these tests assert the
+    # steady state is flat.
+
+    def test_string_expression_update_no_leak(self):
+        long_literal = "X" * 256
+        tbl = Table({"x": "integer", "c": "string"}, index="x")
+        view = tbl.view(expressions={"e": 'concat("c", \'' + long_literal + "')"})
+
+        for _ in range(100):
+            tbl.update([{"x": 1, "c": "value"}])
+
+        process = psutil.Process(os.getpid())
+        mem = process.memory_info().rss
+        for _ in range(5000):
+            tbl.update([{"x": 1, "c": "value"}])
+        mem2 = process.memory_info().rss
+
+        view.delete()
+        tbl.delete()
+
+        assert (mem2 - mem) < 2000000
+
+    def test_string_expression_update_bounded_vocab_no_leak(self):
+        # Cycles through a small fixed set of distinct values. Exercises the
+        # cross-page `string_exists` lookup the fix relies on: once the
+        # vocabulary is fully populated, subsequent interns must resolve to
+        # existing pointers rather than allocating new ones.
+        values = ["alpha", "bravo", "charlie", "delta", "echo"]
+        tbl = Table({"x": "integer", "c": "string"}, index="x")
+        view = tbl.view(expressions={"e": 'upper("c")'})
+
+        for i in range(100):
+            tbl.update([{"x": 1, "c": values[i % len(values)]}])
+
+        process = psutil.Process(os.getpid())
+        mem = process.memory_info().rss
+        for i in range(5000):
+            tbl.update([{"x": 1, "c": values[i % len(values)]}])
+        mem2 = process.memory_info().rss
+
+        view.delete()
+        tbl.delete()
+
+        assert (mem2 - mem) < 2000000