diff --git a/chdb-dataframe/install b/chdb-dataframe/install
index d1c83816b3..98e0957273 100755
--- a/chdb-dataframe/install
+++ b/chdb-dataframe/install
@@ -2,11 +2,38 @@
 set -e
 
 sudo apt-get update -y
-sudo apt-get install -y python3-pip python3-venv
+sudo apt-get install -y python3-pip python3-venv unzip
 
 if [ ! -d myenv ]; then
     python3 -m venv myenv
 fi
 # shellcheck disable=SC1091
 source myenv/bin/activate
-pip install --quiet pandas pyarrow chdb fastapi uvicorn
+
+# Everything except chdb still comes from PyPI.
+pip install --quiet pandas pyarrow fastapi uvicorn
+
+# chdb: install a specific chdb-core CI build instead of the PyPI `chdb`
+# release, to benchmark an unreleased build. The artifact is
+# chdb-io/chdb-core's linux-x86_64 build, mirrored by nightly.link so the
+# benchmark machine can fetch it without a GitHub token. It ships a
+# cp39-abi3 wheel that imports as `chdb` (server.py is unchanged), next to
+# libchdb tarballs and debug info we don't need.
+CHDB_ARTIFACT_URL="${CHDB_ARTIFACT_URL:-https://nightly.link/chdb-io/chdb-core/actions/runs/31572981058/chdb-artifacts-linux-x86_64.zip}"
+rm -rf chdb-artifact chdb-artifact.zip
+curl -fSL --retry 3 -o chdb-artifact.zip "$CHDB_ARTIFACT_URL"
+# Flatten (-j): wheels sit at the zip root or under dist/ depending on the build.
+unzip -q -o -j chdb-artifact.zip '*.whl' -d chdb-artifact
+
+# The full wheel, not chdb_core_lite.
+wheel=$(ls chdb-artifact/chdb_core-*.whl 2>/dev/null | grep -v _lite | head -n1)
+if [ -z "$wheel" ]; then
+    echo "install: no chdb_core wheel found in artifact:" >&2
+    ls -la chdb-artifact/ >&2 || true
+    exit 1
+fi
+echo "install: installing $wheel"
+pip install --quiet "$wheel"
+
+# Fail at install (not query) time if the wheel is broken or lacks chdb.
+python3 -c "import chdb; print('chdb', chdb.__version__)"
diff --git a/chdb-dataframe/results/20260808/c6a.metal.json b/chdb-dataframe/results/20260808/c6a.metal.json
new file mode 100644
index 0000000000..c8a941059f
--- /dev/null
+++ b/chdb-dataframe/results/20260808/c6a.metal.json
@@ -0,0 +1,60 @@
+{
+      "system": "chDB (DataFrame)",
+      "date": "2026-08-08",
+      "machine": "c6a.metal",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative","embedded","stateless","Python","dataframe","in-memory","lukewarm-cold-run"],
+      "load_time": 18,
+      "data_size": 81770409884,
+      "concurrent_qps": 2.503,
+      "concurrent_error_ratio": 0,
+      "result": [
+        [71.519, 0.357, 0.057],
+        [71.903, 0.415, 0.088],
+        [71.805, 0.038, 0.04],
+        [71.794, 0.035, 0.035],
+        [72.034, 0.088, 0.089],
+        [71.551, 0.112, 0.11],
+        [71.378, 0.031, 0.028],
+        [71.28, 0.406, 0.1],
+        [72.727, 0.818, 0.832],
+        [72.337, 0.899, 0.883],
+        [71.655, 1.292, 0.908],
+        [71.843, 0.725, 0.384],
+        [72.306, 0.952, 0.648],
+        [73.298, 2.036, 1.716],
+        [71.837, 0.605, 0.285],
+        [71.744, 0.184, 0.181],
+        [71.655, 0.307, 0.313],
+        [71.804, 0.232, 0.235],
+        [72.869, 0.532, 0.531],
+        [71.566, 0.408, 0.087],
+        [71.947, 0.553, 0.226],
+        [71.899, 0.478, 0.15],
+        [71.938, 0.525, 0.218],
+        [72.936, 1.675, 1.321],
+        [71.546, 0.449, 0.112],
+        [71.438, 0.43, 0.103],
+        [71.761, 0.446, 0.12],
+        [71.789, 0.548, 0.23],
+        [73.656, 1.567, 1.226],
+        [71.859, 0.064, 0.064],
+        [72.29, 0.896, 0.564],
+        [72.276, 0.635, 0.301],
+        [72.702, 1.007, 0.99],
+        [71.904, 0.792, 0.793],
+        [72.292, 0.815, 0.795],
+        [71.54, 0.19, 0.189],
+        [71.994, 0.642, 0.315],
+        [72.023, 0.568, 0.252],
+        [71.669, 0.575, 0.242],
+        [71.857, 0.565, 0.254],
+        [71.816, 0.618, 0.3],
+        [71.978, 0.589, 0.26],
+        [71.753, 0.552, 0.242]
+]
+  } 
+  
\ No newline at end of file
diff --git a/chdb-dataframe/results/20260810/c6a.metal.json b/chdb-dataframe/results/20260810/c6a.metal.json
new file mode 100644
index 0000000000..fbac0c485f
--- /dev/null
+++ b/chdb-dataframe/results/20260810/c6a.metal.json
@@ -0,0 +1,60 @@
+{
+      "system": "chDB (DataFrame)",
+      "date": "2026-08-10",
+      "machine": "c6a.metal",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative","embedded","stateless","Python","dataframe","in-memory","lukewarm-cold-run"],
+      "load_time": 18,
+      "data_size": 81770409884,
+      "concurrent_qps": 4.728,
+      "concurrent_error_ratio": 0,
+      "result": [
+        [71.955, 0.004, 0.003],
+        [72.016, 0.024, 0.024],
+        [71.882, 0.04, 0.033],
+        [71.962, 0.031, 0.032],
+        [72.333, 0.085, 0.079],
+        [72.37, 0.103, 0.099],
+        [72.715, 0.025, 0.024],
+        [71.994, 0.03, 0.029],
+        [72.301, 0.347, 0.324],
+        [72.374, 0.362, 0.376],
+        [72.809, 0.477, 0.509],
+        [72.358, 0.189, 0.169],
+        [71.732, 0.222, 0.221],
+        [72.772, 0.512, 0.514],
+        [71.921, 0.152, 0.144],
+        [72.25, 0.121, 0.118],
+        [71.882, 0.277, 0.273],
+        [72.259, 0.209, 0.21],
+        [72.955, 0.515, 0.515],
+        [71.833, 0.034, 0.036],
+        [72.117, 0.086, 0.084],
+        [72.127, 0.093, 0.093],
+        [71.723, 0.163, 0.165],
+        [72.672, 0.814, 0.758],
+        [72.207, 0.062, 0.057],
+        [71.923, 0.04, 0.039],
+        [72.567, 0.056, 0.055],
+        [72.448, 0.117, 0.11],
+        [72.959, 0.452, 0.456],
+        [72.234, 0.058, 0.058],
+        [72.216, 0.208, 0.203],
+        [72.693, 0.198, 0.201],
+        [73.159, 1.07, 1.084],
+        [72.48, 0.472, 0.468],
+        [72.792, 0.467, 0.467],
+        [72.03, 0.11, 0.106],
+        [72.431, 0.13, 0.124],
+        [72.185, 0.098, 0.096],
+        [72.097, 0.101, 0.105],
+        [71.862, 0.122, 0.129],
+        [72.045, 0.109, 0.103],
+        [72.105, 0.099, 0.101],
+        [72.143, 0.075, 0.077]
+]
+  } 
+  
\ No newline at end of file
diff --git a/chdb-dataframe/results/20260812/c6a.metal.json b/chdb-dataframe/results/20260812/c6a.metal.json
new file mode 100644
index 0000000000..3c38c0aacc
--- /dev/null
+++ b/chdb-dataframe/results/20260812/c6a.metal.json
@@ -0,0 +1,60 @@
+{
+      "system": "chDB (DataFrame)",
+      "date": "2026-08-12",
+      "machine": "c6a.metal",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative","embedded","stateless","Python","dataframe","in-memory","lukewarm-cold-run"],
+      "load_time": 18,
+      "data_size": 81770409884,
+      "concurrent_qps": 4.687,
+      "concurrent_error_ratio": 0,
+      "result": [
+        [72.101, 0.003, 0.003],
+        [72.488, 0.026, 0.026],
+        [72.105, 0.034, 0.034],
+        [71.992, 0.033, 0.034],
+        [72.018, 0.088, 0.089],
+        [72.046, 0.103, 0.107],
+        [72.354, 0.025, 0.023],
+        [71.842, 0.031, 0.032],
+        [72.289, 0.319, 0.36],
+        [73.029, 0.377, 0.377],
+        [72.488, 0.493, 0.495],
+        [72.037, 0.174, 0.203],
+        [72.351, 0.233, 0.228],
+        [72.575, 0.528, 0.53],
+        [72.321, 0.154, 0.156],
+        [72.22, 0.118, 0.116],
+        [72.126, 0.281, 0.281],
+        [71.807, 0.209, 0.21],
+        [72.37, 0.517, 0.522],
+        [72.052, 0.042, 0.035],
+        [72.067, 0.087, 0.087],
+        [72.163, 0.097, 0.085],
+        [72.722, 0.166, 0.152],
+        [72.762, 0.802, 0.783],
+        [72.075, 0.056, 0.056],
+        [71.959, 0.04, 0.039],
+        [72.206, 0.055, 0.055],
+        [72.188, 0.131, 0.128],
+        [72.792, 0.456, 0.453],
+        [72.051, 0.069, 0.061],
+        [72.018, 0.212, 0.208],
+        [72.258, 0.195, 0.205],
+        [73.096, 1.042, 0.987],
+        [72.477, 0.468, 0.466],
+        [72.518, 0.48, 0.459],
+        [72.452, 0.104, 0.099],
+        [72.277, 0.131, 0.127],
+        [72.07, 0.101, 0.103],
+        [72.332, 0.1, 0.099],
+        [71.92, 0.122, 0.129],
+        [72.157, 0.11, 0.109],
+        [71.948, 0.103, 0.099],
+        [72.087, 0.072, 0.072]
+]
+  } 
+  
\ No newline at end of file
diff --git a/polars-dataframe/results/20260810/c6a.metal.json b/polars-dataframe/results/20260810/c6a.metal.json
new file mode 100644
index 0000000000..b9bbba2fb5
--- /dev/null
+++ b/polars-dataframe/results/20260810/c6a.metal.json
@@ -0,0 +1,60 @@
+{
+      "system": "Polars (DataFrame)",
+      "date": "2026-08-10",
+      "machine": "c6a.metal",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["column-oriented","dataframe","in-memory"],
+      "load_time": 5,
+      "data_size": 58970980436,
+      "concurrent_qps": 4.772,
+      "concurrent_error_ratio": 0,
+      "result": [
+        [58, 0.003, 0.002],
+        [58.501, 0.009, 0.011],
+        [58.228, 0.011, 0.011],
+        [58.11, 0.015, 0.015],
+        [58.369, 0.132, 0.125],
+        [58.5, 0.22, 0.224],
+        [58.034, 0.011, 0.011],
+        [58.191, 0.027, 0.03],
+        [58.881, 0.476, 0.489],
+        [58.95, 0.533, 0.521],
+        [58.439, 0.101, 0.099],
+        [58.374, 0.107, 0.107],
+        [58.432, 0.199, 0.207],
+        [58.586, 0.427, 0.415],
+        [58.633, 0.275, 0.288],
+        [58.432, 0.21, 0.228],
+        [59.096, 0.71, 0.709],
+        [58.845, 0.622, 0.626],
+        [59.486, 1.135, 1.138],
+        [58.123, 0.015, 0.015],
+        [58.511, 0.123, 0.12],
+        [58.546, 0.169, 0.163],
+        [58.465, 0.296, 0.282],
+        [58.413, 0.243, 0.227],
+        [58.229, 0.047, 0.049],
+        [58.448, 0.049, 0.046],
+        [58.17, 0.077, 0.081],
+        [58.523, 0.261, 0.247],
+        [59.31, 0.983, 0.984],
+        [58.34, 0.041, 0.038],
+        [58.492, 0.245, 0.243],
+        [58.604, 0.269, 0.268],
+        [59.775, 1.496, 1.433],
+        [59.35, 1.114, 1.071],
+        [59.216, 0.85, 0.828],
+        [58.7, 0.205, 0.201],
+        [58.387, 0.087, 0.087],
+        [58.289, 0.072, 0.071],
+        [58.376, 0.041, 0.043],
+        [58.301, 0.096, 0.082],
+        [58.305, 0.078, 0.074],
+        [58.337, 0.052, 0.048],
+        [58.198, 0.041, 0.044]
+]
+  } 
+  
\ No newline at end of file
diff --git a/polars-dataframe/results/20260812/c6a.metal.json b/polars-dataframe/results/20260812/c6a.metal.json
new file mode 100644
index 0000000000..bc40d0f848
--- /dev/null
+++ b/polars-dataframe/results/20260812/c6a.metal.json
@@ -0,0 +1,60 @@
+{
+      "system": "Polars (DataFrame)",
+      "date": "2026-08-12",
+      "machine": "c6a.metal",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["column-oriented","dataframe","in-memory"],
+      "load_time": 4,
+      "data_size": 58970980436,
+      "concurrent_qps": 4.877,
+      "concurrent_error_ratio": 0,
+      "result": [
+        [58.178, 0.003, 0.003],
+        [58.113, 0.008, 0.01],
+        [58.298, 0.008, 0.009],
+        [58.258, 0.015, 0.015],
+        [58.3, 0.121, 0.118],
+        [58.283, 0.213, 0.21],
+        [58.294, 0.011, 0.012],
+        [58.201, 0.028, 0.028],
+        [58.709, 0.49, 0.478],
+        [58.583, 0.441, 0.434],
+        [58.226, 0.102, 0.098],
+        [58.331, 0.115, 0.11],
+        [58.629, 0.198, 0.197],
+        [58.753, 0.465, 0.46],
+        [58.563, 0.223, 0.22],
+        [58.512, 0.193, 0.193],
+        [58.931, 0.692, 0.68],
+        [59.016, 0.719, 0.695],
+        [59.234, 1.181, 1.143],
+        [58.141, 0.014, 0.015],
+        [58.27, 0.107, 0.109],
+        [58.299, 0.168, 0.167],
+        [58.645, 0.328, 0.31],
+        [58.529, 0.261, 0.3],
+        [58.362, 0.049, 0.051],
+        [58.123, 0.05, 0.052],
+        [58.307, 0.102, 0.093],
+        [58.62, 0.249, 0.253],
+        [59.123, 0.952, 0.954],
+        [58.311, 0.049, 0.048],
+        [58.611, 0.23, 0.24],
+        [58.59, 0.279, 0.274],
+        [59.936, 1.46, 1.423],
+        [59.169, 0.863, 0.848],
+        [59.158, 0.947, 0.969],
+        [58.506, 0.159, 0.162],
+        [58.243, 0.093, 0.091],
+        [58.352, 0.081, 0.07],
+        [58.435, 0.046, 0.044],
+        [58.291, 0.094, 0.079],
+        [58.317, 0.071, 0.069],
+        [58.264, 0.056, 0.053],
+        [58.153, 0.043, 0.043]
+]
+  } 
+  
\ No newline at end of file