diff --git a/pyproject.toml b/pyproject.toml
index 5e22fda10..656d4d95d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,9 +64,11 @@ dev = [
   "pytest>=8.4.1",
   "pytest-cov>=6.2.1",
   "pytest-xdist>=3.8",
+  "pytest-memray>=1.8.0",
   "reuse>=5.0.2",
   "ruff>=0.12.8",
   "scipy-stubs>=1.16.2.4",
+  "memray>=1.19.1",
 ]
 
 [tool.hatch.build.targets.wheel]
@@ -249,6 +251,13 @@ args = [
   { name = "markers", type = "string", default = "", help = "Only run tests matching the given pytest markers expression" },
 ]
 
+[tool.poe.tasks.tests-memory]
+help = "Run pytest with xdist, marker filtering, and coverage"
+cmd = "pytest --memray --most-allocations=10 --numprocesses=auto ${markers:+ -m $markers} --cov --cov-report=term-missing --cov-report=xml:coverage.xml"
+args = [
+  { name = "markers", type = "string", default = "", help = "Only run tests matching the given pytest markers expression" },
+]
+
 [tool.poe.tasks.doctests]
 help = "Run all docstring examples via pytest’s doctest plugin"
 cmd = "pytest --numprocesses=auto --doctest-modules packages/*/src --maxfail=1"
diff --git a/uv.lock b/uv.lock
index bedf5dfb7..2741faa22 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2015,6 +2015,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/65/bd/606e2f7eb0da042bffd8711a7427f7a28ca501aa6b1e3367ae3c7d4dc489/licensecheck-2025.1.0-py3-none-any.whl", hash = "sha256:eb20131cd8f877e5396958fd7b00cdb2225436c37a59dba4cf36d36079133a17", size = 26681, upload-time = "2025-03-26T22:58:03.145Z" },
 ]
 
+[[package]]
+name = "linkify-it-py"
+version = "2.0.3"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "uc-micro-py" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/2a/ae/bb56c6828e4797ba5a4821eec7c43b8bf40f69cda4d4f5f8c8a2810ec96a/linkify-it-py-2.0.3.tar.gz", hash = "sha256:68cda27e162e9215c17d786649d1da0021a451bdc436ef9e0fa0ba5234b9b048", size = 27946, upload-time = "2024-02-04T14:48:04.179Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/04/1e/b832de447dee8b582cac175871d2f6c3d5077cc56d5575cadba1fd1cccfa/linkify_it_py-2.0.3-py3-none-any.whl", hash = "sha256:6bcbc417b0ac14323382aef5c5192c0075bf8a9d6b41820a2b66371eac6b6d79", size = 19820, upload-time = "2024-02-04T14:48:02.496Z" },
+]
+
 [[package]]
 name = "logistro"
 version = "2.0.1"
@@ -2058,6 +2070,11 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/42/d7/1ec15b46af6af88f19b8e5ffea08fa375d433c998b8a7639e76935c14f1f/markdown_it_py-3.0.0-py3-none-any.whl", hash = "sha256:355216845c60bd96232cd8d8c40e8f9765cc86f46880e43a8fd22dc1a1a8cab1", size = 87528, upload-time = "2023-06-03T06:41:11.019Z" },
 ]
 
+[package.optional-dependencies]
+linkify = [
+    { name = "linkify-it-py" },
+]
+
 [[package]]
 name = "markupsafe"
 version = "3.0.3"
@@ -2208,6 +2225,43 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b3/38/89ba8ad64ae25be8de66a6d463314cf1eb366222074cfda9ee839c56a4b4/mdurl-0.1.2-py3-none-any.whl", hash = "sha256:84008a41e51615a49fc9966191ff91509e3c40b939176e643fd50a5c2196b8f8", size = 9979, upload-time = "2022-08-14T12:40:09.779Z" },
 ]
 
+[[package]]
+name = "memray"
+version = "1.19.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "jinja2" },
+    { name = "rich" },
+    { name = "textual" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/36/18/5df5995a7b142e12ab194f4b2fd1473efd51f4f622dfe47f3c013c3c11f7/memray-1.19.1.tar.gz", hash = "sha256:7fcf306eae2c00144920b01913f42fa7f235af7a80fa3226ab124672a5cb1d8f", size = 2395421, upload-time = "2025-10-16T02:26:51.513Z" }
+wheels = [
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+    { url = "https://files.pythonhosted.org/packages/fa/8c/92972176b8079a7ffb367958e118475c7a0d13c3983215fd280f4ea69c6f/memray-1.19.1-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:595414e753a0152282974b954827aeaf552dc02f47ed16a2743821ed461b6c51", size = 2155387, upload-time = "2025-10-16T02:25:49.802Z" },
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+]
+
 [[package]]
 name = "microsoft-python-type-stubs"
 version = "0"
@@ -2686,6 +2740,7 @@ models = [
 [package.dev-dependencies]
 dev = [
     { name = "licensecheck" },
+    { name = "memray" },
     { name = "microsoft-python-type-stubs" },
     { name = "moto", extra = ["s3", "server"] },
     { name = "openstef-beam" },
@@ -2698,6 +2753,7 @@ dev = [
     { name = "pyright" },
     { name = "pytest" },
     { name = "pytest-cov" },
+    { name = "pytest-memray" },
     { name = "pytest-xdist" },
     { name = "reuse" },
     { name = "ruff" },
@@ -2720,6 +2776,7 @@ provides-extras = ["all", "beam", "models"]
 [package.metadata.requires-dev]
 dev = [
     { name = "licensecheck", specifier = ">=2025.1" },
+    { name = "memray", specifier = ">=1.19.1" },
     { name = "microsoft-python-type-stubs", git = "https://github.com/microsoft/python-type-stubs.git" },
     { name = "moto", extras = ["s3", "server"], specifier = ">=5.1.11" },
     { name = "openstef-beam", editable = "packages/openstef-beam" },
@@ -2732,6 +2789,7 @@ dev = [
     { name = "pyright", specifier = ">=1.1.404" },
     { name = "pytest", specifier = ">=8.4.1" },
     { name = "pytest-cov", specifier = ">=6.2.1" },
+    { name = "pytest-memray", specifier = ">=1.8.0" },
     { name = "pytest-xdist", specifier = ">=3.8" },
     { name = "reuse", specifier = ">=5.0.2" },
     { name = "ruff", specifier = ">=0.12.8" },
@@ -3737,6 +3795,19 @@ wheels = [
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 ]
 
+[[package]]
+name = "pytest-memray"
+version = "1.8.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "memray" },
+    { name = "pytest" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/3d/28/f67963efed56d847d028d0bb939f26cdeb32c4de474b3befc9da43bf18f9/pytest_memray-1.8.0.tar.gz", hash = "sha256:c0c706ef81941a7aa7064f2b3b8b5cdc0cea72b5277c6a6a09b113ca9ab30bdb", size = 240608, upload-time = "2025-08-18T17:32:47.329Z" }
+wheels = [
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+
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 name = "pytest-timeout"
 version = "2.4.0"
@@ -4774,6 +4845,23 @@ wheels = [
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 ]
 
+[[package]]
+name = "textual"
+version = "6.11.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "markdown-it-py", extra = ["linkify"] },
+    { name = "mdit-py-plugins" },
+    { name = "platformdirs" },
+    { name = "pygments" },
+    { name = "rich" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/55/06/906f86bbc59ec7cd3fb424250e19ce670406d1f28e49e86c2221e9fd7ed2/textual-6.11.0.tar.gz", hash = "sha256:08237ebda0cfbbfd1a4e2fd3039882b35894a73994f6f0fcc12c5b0d78acf3cc", size = 1584292, upload-time = "2025-12-18T10:48:38.033Z" }
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+]
+
 [[package]]
 name = "threadpoolctl"
 version = "3.6.0"
@@ -4946,6 +5034,15 @@ wheels = [
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 ]
 
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