Fix language runtime size measurement correctness (Issue #55)

.changeset/fix-runtime-size-measurements.md

@@ -0,0 +1,5 @@
+---
+bump: patch
+---
+
+Fix language runtime size measurements: correct size_mb rounding from floor-division (MiB) to nearest-MB rounding, use du-based measurement for Rust and Homebrew to avoid near-zero df deltas, and add missing bubblewrap component measurement.

README.md

@@ -189,36 +189,37 @@ The container runs as the `sandbox` user with home directory at `/home/sandbox`.
 
 _Last updated: 2026-02-22T02:06:37Z_
 
-**Total installation size: 7545 MB**
+**Total installation size: 7198.0 MB**
 
 | Component | Category | Size (MB) |
 |-----------|----------|-----------|
-| Swift 6.x | Runtime | 2532 |
-| Opam + Rocq/Coq | Runtime | 1246 |
-| SDKMAN + Java 21 | Runtime | 552 |
-| .NET SDK 8.0 | Runtime | 481 |
-| Pyenv + Python (latest) | Runtime | 369 |
-| Perlbrew + Perl (latest) | Runtime | 346 |
-| Go (latest) | Runtime | 268 |
-| NVM + Node.js 20 | Runtime | 219 |
-| Kotlin (via SDKMAN) | Runtime | 161 |
-| rbenv + Ruby (latest) | Runtime | 157 |
-| R Language | Runtime | 115 |
-| Deno | Runtime | 113 |
-| Bun | Runtime | 97 |
-| PHP 8.3 (via Homebrew) | Runtime | 52 |
-| Lean (via elan) | Runtime | 12 |
-| Rust (via rustup) | Runtime | 0 |
-| C/C++ Tools (CMake, Clang, LLVM, LLD) | Build Tools | 56 |
-| Assembly Tools (NASM, FASM) | Build Tools | 3 |
-| GitLab CLI | Development Tools | 27 |
-| gh-setup-git-identity | Development Tools | 4 |
-| glab-setup-git-identity | Development Tools | 4 |
-| GitHub CLI | Development Tools | 0 |
-| Homebrew | Package Manager | 0 |
-| Python Build Dependencies | Dependencies | 40 |
-| Ruby Build Dependencies | Dependencies | 0 |
-| Essential Tools | System | 0 |
+| Swift 6.x | Runtime | 2655.26 |
+| Opam + Rocq/Coq | Runtime | 1307.27 |
+| SDKMAN + Java 21 | Runtime | 579.1 |
+| .NET SDK 8.0 | Runtime | 504.91 |
+| Pyenv + Python (latest) | Runtime | 387.92 |
+| Perlbrew + Perl (latest) | Runtime | 362.91 |
+| Go (latest) | Runtime | 281.62 |
+| NVM + Node.js 20 | Runtime | 230.43 |
+| Kotlin (via SDKMAN) | Runtime | 169.11 |
+| rbenv + Ruby (latest) | Runtime | 164.96 |
+| R Language | Runtime | 121.15 |
+| Deno | Runtime | 119.12 |
+| Bun | Runtime | 102.38 |
+| PHP 8.3 (via Homebrew) | Runtime | 55.08 |
+| Lean (via elan) | Runtime | 13.29 |
+| Rust (via rustup) | Runtime | 0.1 |
+| C/C++ Tools (CMake, Clang, LLVM, LLD) | Build Tools | 58.83 |
+| Assembly Tools (NASM, FASM) | Build Tools | 3.92 |
+| GitLab CLI | Development Tools | 29.19 |
+| glab-setup-git-identity | Development Tools | 4.37 |
+| gh-setup-git-identity | Development Tools | 4.35 |
+| GitHub CLI | Development Tools | 0.55 |
+| Homebrew | Package Manager | 0.02 |
+| Python Build Dependencies | Dependencies | 42.52 |
+| Bubblewrap | Dependencies | 0.0 |
+| Ruby Build Dependencies | Dependencies | 0.0 |
+| Essential Tools | System | 0.74 |
 
 _Note: Sizes are measured after cleanup and may vary based on system state and package versions._
 

data/disk-space-measurements.json

@@ -1 +1,168 @@
-{"generated_at": "2026-02-22T02:06:37Z", "total_size_mb": 7545, "components": [{"name": "Essential Tools", "category": "System", "size_bytes": 741376, "size_mb": 0}, {"name": ".NET SDK 8.0", "category": "Runtime", "size_bytes": 504905728, "size_mb": 481}, {"name": "C/C++ Tools (CMake, Clang, LLVM, LLD)", "category": "Build Tools", "size_bytes": 58834944, "size_mb": 56}, {"name": "Assembly Tools (NASM, FASM)", "category": "Build Tools", "size_bytes": 3915776, "size_mb": 3}, {"name": "R Language", "category": "Runtime", "size_bytes": 121147392, "size_mb": 115}, {"name": "Ruby Build Dependencies", "category": "Dependencies", "size_bytes": 0, "size_mb": 0}, {"name": "Python Build Dependencies", "category": "Dependencies", "size_bytes": 42520576, "size_mb": 40}, {"name": "GitHub CLI", "category": "Development Tools", "size_bytes": 548864, "size_mb": 0}, {"name": "GitLab CLI", "category": "Development Tools", "size_bytes": 29188096, "size_mb": 27}, {"name": "Bun", "category": "Runtime", "size_bytes": 102383616, "size_mb": 97}, {"name": "gh-setup-git-identity", "category": "Development Tools", "size_bytes": 4354048, "size_mb": 4}, {"name": "glab-setup-git-identity", "category": "Development Tools", "size_bytes": 4374528, "size_mb": 4}, {"name": "Deno", "category": "Runtime", "size_bytes": 119123968, "size_mb": 113}, {"name": "NVM + Node.js 20", "category": "Runtime", "size_bytes": 230428672, "size_mb": 219}, {"name": "Pyenv + Python (latest)", "category": "Runtime", "size_bytes": 387915776, "size_mb": 369}, {"name": "Go (latest)", "category": "Runtime", "size_bytes": 281624576, "size_mb": 268}, {"name": "Rust (via rustup)", "category": "Runtime", "size_bytes": 98304, "size_mb": 0}, {"name": "SDKMAN + Java 21", "category": "Runtime", "size_bytes": 579096576, "size_mb": 552}, {"name": "Kotlin (via SDKMAN)", "category": "Runtime", "size_bytes": 169107456, "size_mb": 161}, {"name": "Lean (via elan)", "category": "Runtime", "size_bytes": 13291520, "size_mb": 12}, {"name": "Opam + Rocq/Coq", "category": "Runtime", "size_bytes": 1307271168, "size_mb": 1246}, {"name": "Homebrew", "category": "Package Manager", "size_bytes": 16384, "size_mb": 0}, {"name": "PHP 8.3 (via Homebrew)", "category": "Runtime", "size_bytes": 55078912, "size_mb": 52}, {"name": "Perlbrew + Perl (latest)", "category": "Runtime", "size_bytes": 362905600, "size_mb": 346}, {"name": "rbenv + Ruby (latest)", "category": "Runtime", "size_bytes": 164962304, "size_mb": 157}, {"name": "Swift 6.x", "category": "Runtime", "size_bytes": 2655264768, "size_mb": 2532}]}
+{
+  "generated_at": "2026-02-22T02:06:37Z",
+  "total_size_mb": 7198.0,
+  "components": [
+    {
+      "name": "Essential Tools",
+      "category": "System",
+      "size_bytes": 741376,
+      "size_mb": 0.74
+    },
+    {
+      "name": ".NET SDK 8.0",
+      "category": "Runtime",
+      "size_bytes": 504905728,
+      "size_mb": 504.91
+    },
+    {
+      "name": "C/C++ Tools (CMake, Clang, LLVM, LLD)",
+      "category": "Build Tools",
+      "size_bytes": 58834944,
+      "size_mb": 58.83
+    },
+    {
+      "name": "Assembly Tools (NASM, FASM)",
+      "category": "Build Tools",
+      "size_bytes": 3915776,
+      "size_mb": 3.92
+    },
+    {
+      "name": "R Language",
+      "category": "Runtime",
+      "size_bytes": 121147392,
+      "size_mb": 121.15
+    },
+    {
+      "name": "Bubblewrap",
+      "category": "Dependencies",
+      "size_bytes": 0,
+      "size_mb": 0.0
+    },
+    {
+      "name": "Ruby Build Dependencies",
+      "category": "Dependencies",
+      "size_bytes": 0,
+      "size_mb": 0.0
+    },
+    {
+      "name": "Python Build Dependencies",
+      "category": "Dependencies",
+      "size_bytes": 42520576,
+      "size_mb": 42.52
+    },
+    {
+      "name": "GitHub CLI",
+      "category": "Development Tools",
+      "size_bytes": 548864,
+      "size_mb": 0.55
+    },
+    {
+      "name": "GitLab CLI",
+      "category": "Development Tools",
+      "size_bytes": 29188096,
+      "size_mb": 29.19
+    },
+    {
+      "name": "Bun",
+      "category": "Runtime",
+      "size_bytes": 102383616,
+      "size_mb": 102.38
+    },
+    {
+      "name": "gh-setup-git-identity",
+      "category": "Development Tools",
+      "size_bytes": 4354048,
+      "size_mb": 4.35
+    },
+    {
+      "name": "glab-setup-git-identity",
+      "category": "Development Tools",
+      "size_bytes": 4374528,
+      "size_mb": 4.37
+    },
+    {
+      "name": "Deno",
+      "category": "Runtime",
+      "size_bytes": 119123968,
+      "size_mb": 119.12
+    },
+    {
+      "name": "NVM + Node.js 20",
+      "category": "Runtime",
+      "size_bytes": 230428672,
+      "size_mb": 230.43
+    },
+    {
+      "name": "Pyenv + Python (latest)",
+      "category": "Runtime",
+      "size_bytes": 387915776,
+      "size_mb": 387.92
+    },
+    {
+      "name": "Go (latest)",
+      "category": "Runtime",
+      "size_bytes": 281624576,
+      "size_mb": 281.62
+    },
+    {
+      "name": "Rust (via rustup)",
+      "category": "Runtime",
+      "size_bytes": 98304,
+      "size_mb": 0.1
+    },
+    {
+      "name": "SDKMAN + Java 21",
+      "category": "Runtime",
+      "size_bytes": 579096576,
+      "size_mb": 579.1
+    },
+    {
+      "name": "Kotlin (via SDKMAN)",
+      "category": "Runtime",
+      "size_bytes": 169107456,
+      "size_mb": 169.11
+    },
+    {
+      "name": "Lean (via elan)",
+      "category": "Runtime",
+      "size_bytes": 13291520,
+      "size_mb": 13.29
+    },
+    {
+      "name": "Opam + Rocq/Coq",
+      "category": "Runtime",
+      "size_bytes": 1307271168,
+      "size_mb": 1307.27
+    },
+    {
+      "name": "Homebrew",
+      "category": "Package Manager",
+      "size_bytes": 16384,
+      "size_mb": 0.02
+    },
+    {
+      "name": "PHP 8.3 (via Homebrew)",
+      "category": "Runtime",
+      "size_bytes": 55078912,
+      "size_mb": 55.08
+    },
+    {
+      "name": "Perlbrew + Perl (latest)",
+      "category": "Runtime",
+      "size_bytes": 362905600,
+      "size_mb": 362.91
+    },
+    {
+      "name": "rbenv + Ruby (latest)",
+      "category": "Runtime",
+      "size_bytes": 164962304,
+      "size_mb": 164.96
+    },
+    {
+      "name": "Swift 6.x",
+      "category": "Runtime",
+      "size_bytes": 2655264768,
+      "size_mb": 2655.26
+    }
+  ]
+}