konard · Oct 6, 2026 · Oct 6, 2026 · Oct 6, 2026 · Oct 6, 2026
diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
@@ -120,8 +120,10 @@ jobs:
           echo "NAME=$name" >> "$GITHUB_ENV"
           if [ "$LANGUAGE" = rust ]; then
             benchmark=(rust/target/release/sqlite-vs-doublets)
+            toolchain="$(rustc --version)"
           else
             benchmark=(dotnet csharp/SQLiteVSDoublets/bin/Release/net10.0/sqlite-vs-doublets.dll)
+            toolchain=".NET SDK $(dotnet --version)"
           fi
           "${benchmark[@]}" "$CATEGORY" "$BITS" "$SIZE" \
             --directory "$RUNNER_TEMP/storage" --output "$RUNNER_TEMP/measured.json"
@@ -133,6 +135,7 @@ jobs:
             --arg date "$(date -u +%Y-%m-%d)" --arg machine "$machine" \
             '. + {run_url: $run_url, source_sha: $source_sha, tree_sha: $tree_sha, date: $date, machine: $machine}' \
             "$RUNNER_TEMP/measured.json" > "results/$name.json"
+          python3 scripts/benchmark_provenance.py "results/$name.json" --toolchain "$toolchain"
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
         with:
           name: results-${{ env.NAME }}

diff --git a/.github/workflows/quality.yml b/.github/workflows/quality.yml
@@ -4,9 +4,9 @@ on:
   workflow_dispatch:
   push:
     branches: [main]
-    paths: ['.github/**', 'scripts/**', 'experiments/**', 'pyproject.toml', 'README*.md', 'CONTRIBUTING.md', 'cpp/**', '.secretlintrc.json', '.pre-commit-config.yaml', '.markdownlint.json', '.codacy.yml']
+    paths: ['.github/**', 'scripts/**', 'experiments/**', 'pyproject.toml', 'README*.md', 'CONTRIBUTING.md', '.secretlintrc.json', '.pre-commit-config.yaml', '.markdownlint.json', '.codacy.yml']
   pull_request:
-    paths: ['.github/**', 'scripts/**', 'experiments/**', 'pyproject.toml', 'README*.md', 'CONTRIBUTING.md', 'cpp/**', '.secretlintrc.json', '.pre-commit-config.yaml', '.markdownlint.json', '.codacy.yml']
+    paths: ['.github/**', 'scripts/**', 'experiments/**', 'pyproject.toml', 'README*.md', 'CONTRIBUTING.md', '.secretlintrc.json', '.pre-commit-config.yaml', '.markdownlint.json', '.codacy.yml']
 
 permissions:
   contents: read
@@ -59,7 +59,7 @@ jobs:
       - run: python -m unittest discover -s experiments/ci -v
       - name: Verify preserved investigation evidence
         run: python experiments/ci/package_evidence.py dev/log/issues/110/pulls/111 --verify
-      - run: npx --yes markdownlint-cli@0.49.1 README.md README.ru.md CONTRIBUTING.md cpp/README.md
+      - run: npx --yes markdownlint-cli@0.49.1 README.md README.ru.md CONTRIBUTING.md
       - name: Scan maintained source for secrets
         run: git ls-files -z -- ':!dev/log/**' ':!docs/benchmarks/**' ':!*.png' | xargs -0 npx --yes -p secretlint@13.0.7 -p @secretlint/secretlint-rule-preset-recommend@13.0.7 secretlint
 

diff --git a/.gitignore b/.gitignore
@@ -1,12 +1,5 @@
 # Root level gitignore for the repository
 # C# specific gitignore is in csharp/.gitignore
-# C++ specific files
-cpp/build/
-cpp/*.o
-cpp/*.a
-cpp/*.so
-cpp/*.exe
-
 # Common temporary files
 __pycache__/
 .venv/

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -31,7 +31,7 @@ dotnet format whitespace csharp/SQLiteVSDoublets.slnx --verify-no-changes
 dotnet build csharp/SQLiteVSDoublets.slnx -c Release -warnaserror
 (cd csharp && dotnet test --project SQLiteVSDoublets.Tests -c Release \
   --no-build -- --timeout 10m)
-npx --yes markdownlint-cli@0.49.1 README.md README.ru.md CONTRIBUTING.md cpp/README.md
+npx --yes markdownlint-cli@0.49.1 README.md README.ru.md CONTRIBUTING.md
 ```
 
 Workflow validation also runs actionlint with ShellCheck and zizmor. The pinned
@@ -60,7 +60,6 @@ reports from the newly fetched branch on every retry.
 This repository contains benchmark executables, without a package release or
 container deployment pipeline. Package changesets, registry credentials, and
 container build steps should be added with an actual distributable component.
-The C++ directory is a placeholder; see [its prerequisites](cpp/README.md).
 
 Immutable investigation evidence is preserved in
 [the issue 110 investigation](dev/log/issues/110/pulls/111/ANALYSIS.md).

diff --git a/README.md b/README.md
diff --git a/README.ru.md b/README.ru.md
diff --git a/cpp/README.md b/cpp/README.md
diff --git a/cpp/conanfile.txt b/cpp/conanfile.txt
diff --git a/docs/benchmarks/links-csharp-32-linear.png b/docs/benchmarks/links-csharp-32-linear.png
diff --git a/docs/benchmarks/links-csharp-32.png b/docs/benchmarks/links-csharp-32.png
diff --git a/docs/benchmarks/links-csharp-64-linear.png b/docs/benchmarks/links-csharp-64-linear.png
diff --git a/docs/benchmarks/links-csharp-64.png b/docs/benchmarks/links-csharp-64.png
diff --git a/docs/benchmarks/links-rust-32-linear.png b/docs/benchmarks/links-rust-32-linear.png
diff --git a/docs/benchmarks/links-rust-32.png b/docs/benchmarks/links-rust-32.png
diff --git a/docs/benchmarks/links-rust-64-linear.png b/docs/benchmarks/links-rust-64-linear.png
diff --git a/docs/benchmarks/links-rust-64.png b/docs/benchmarks/links-rust-64.png
diff --git a/docs/benchmarks/objects-csharp-32-linear.png b/docs/benchmarks/objects-csharp-32-linear.png
diff --git a/docs/benchmarks/objects-csharp-32.png b/docs/benchmarks/objects-csharp-32.png
diff --git a/docs/benchmarks/objects-csharp-64-linear.png b/docs/benchmarks/objects-csharp-64-linear.png
diff --git a/docs/benchmarks/objects-csharp-64.png b/docs/benchmarks/objects-csharp-64.png
diff --git a/docs/benchmarks/objects-rust-32-linear.png b/docs/benchmarks/objects-rust-32-linear.png
diff --git a/docs/benchmarks/objects-rust-32.png b/docs/benchmarks/objects-rust-32.png
diff --git a/docs/benchmarks/objects-rust-64-linear.png b/docs/benchmarks/objects-rust-64-linear.png
diff --git a/docs/benchmarks/objects-rust-64.png b/docs/benchmarks/objects-rust-64.png
diff --git a/docs/benchmarks/results/links-csharp-32-100000.json b/docs/benchmarks/results/links-csharp-32-100000.json
@@ -1159,5 +1159,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/links-csharp-32-1000000.json b/docs/benchmarks/results/links-csharp-32-1000000.json
@@ -711,5 +711,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/links-csharp-32-10000000.json b/docs/benchmarks/results/links-csharp-32-10000000.json
@@ -583,5 +583,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, INTEL(R) XEON(R) PLATINUM 8573C, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, INTEL(R) XEON(R) PLATINUM 8573C, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/links-csharp-64-100000.json b/docs/benchmarks/results/links-csharp-64-100000.json
@@ -1159,5 +1159,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/links-csharp-64-1000000.json b/docs/benchmarks/results/links-csharp-64-1000000.json
@@ -711,5 +711,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/links-csharp-64-10000000.json b/docs/benchmarks/results/links-csharp-64-10000000.json
@@ -583,5 +583,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/links-rust-32-100000.json b/docs/benchmarks/results/links-rust-32-100000.json
@@ -865,5 +865,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/links-rust-32-1000000.json b/docs/benchmarks/results/links-rust-32-1000000.json
@@ -529,5 +529,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/links-rust-32-10000000.json b/docs/benchmarks/results/links-rust-32-10000000.json
@@ -433,5 +433,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/links-rust-64-100000.json b/docs/benchmarks/results/links-rust-64-100000.json
@@ -865,5 +865,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/links-rust-64-1000000.json b/docs/benchmarks/results/links-rust-64-1000000.json
@@ -529,5 +529,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/links-rust-64-10000000.json b/docs/benchmarks/results/links-rust-64-10000000.json
@@ -433,5 +433,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/objects-csharp-32-100000.json b/docs/benchmarks/results/objects-csharp-32-100000.json
@@ -732,5 +732,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/objects-csharp-32-1000000.json b/docs/benchmarks/results/objects-csharp-32-1000000.json
@@ -524,5 +524,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, INTEL(R) XEON(R) PLATINUM 8573C, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, INTEL(R) XEON(R) PLATINUM 8573C, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/objects-csharp-64-100000.json b/docs/benchmarks/results/objects-csharp-64-100000.json
@@ -732,5 +732,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/objects-csharp-64-1000000.json b/docs/benchmarks/results/objects-csharp-64-1000000.json
@@ -524,5 +524,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "Platform.Data.Doublets": "0.18.1"
+    },
+    "toolchain": ".NET SDK 10.0.401"
+  }
 }
diff --git a/docs/benchmarks/results/objects-rust-32-100000.json b/docs/benchmarks/results/objects-rust-32-100000.json
@@ -553,5 +553,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V45 96-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V45 96-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/objects-rust-32-1000000.json b/docs/benchmarks/results/objects-rust-32-1000000.json
@@ -393,5 +393,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V74 80-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/objects-rust-64-100000.json b/docs/benchmarks/results/objects-rust-64-100000.json
@@ -553,5 +553,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V45 96-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 9V45 96-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }
diff --git a/docs/benchmarks/results/objects-rust-64-1000000.json b/docs/benchmarks/results/objects-rust-64-1000000.json
@@ -393,5 +393,11 @@
   "source_sha": "4e269b47eb3e6d0a264b57f27b9a51832562a99b",
   "tree_sha": "412060b55aeed6f627c46da833f68ae21c71a6aa",
   "date": "2026-10-05",
-  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB"
+  "machine": "Ubuntu 24.04.5 LTS, AMD EPYC 7763 64-Core Processor, 4 cores, 16 GiB",
+  "software": {
+    "libraries": {
+      "doublets": "0.5.0"
+    },
+    "toolchain": "rustc 1.99.0 (b940084d7 2026-09-28)"
+  }
 }